/usr/bin/java -Xmx8000000000 -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-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-03 19:45:22,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-03 19:45:22,036 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-03 19:45:22,109 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-03 19:45:22,151 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 [2022-03-03 19:45:22,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-03 19:45:22,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-03 19:45:22,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-03 19:45:22,177 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-03 19:45:22,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-03 19:45:22,178 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-03 19:45:22,178 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-03 19:45:22,178 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-03 19:45:22,178 INFO L138 SettingsManager]: * Use SBE=true [2022-03-03 19:45:22,178 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-03 19:45:22,179 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-03 19:45:22,180 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-03 19:45:22,180 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-03 19:45:22,181 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-03 19:45:22,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:45:22,181 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-03 19:45:22,181 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-03 19:45:22,181 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-03 19:45:22,182 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-03 19:45:22,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-03 19:45:22,182 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-03 19:45:22,182 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-03 19:45:22,182 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-03 19:45:22,388 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-03 19:45:22,420 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-03 19:45:22,422 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-03 19:45:22,423 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-03 19:45:22,424 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-03 19:45:22,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2022-03-03 19:45:22,425 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2022-03-03 19:45:22,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-03 19:45:22,442 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-03 19:45:22,443 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-03 19:45:22,443 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-03 19:45:22,443 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-03 19:45:22,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,456 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,461 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-03 19:45:22,461 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-03 19:45:22,462 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-03 19:45:22,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-03 19:45:22,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-03 19:45:22,468 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-03 19:45:22,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-03 19:45:22,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-03 19:45:22,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-03 19:45:22,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/1) ... [2022-03-03 19:45:22,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-03 19:45:22,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:22,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-03 19:45:22,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-03 19:45:22,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-03 19:45:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-03 19:45:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-03 19:45:22,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-03 19:45:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-03 19:45:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-03 19:45:22,542 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-03 19:45:22,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-03 19:45:22,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-03 19:45:22,543 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-03 19:45:22,580 INFO L234 CfgBuilder]: Building ICFG [2022-03-03 19:45:22,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-03 19:45:22,643 INFO L275 CfgBuilder]: Performing block encoding [2022-03-03 19:45:22,651 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-03 19:45:22,651 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-03 19:45:22,653 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:45:22 BoogieIcfgContainer [2022-03-03 19:45:22,653 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-03 19:45:22,654 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-03 19:45:22,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-03 19:45:22,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-03 19:45:22,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.03 07:45:22" (1/2) ... [2022-03-03 19:45:22,657 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67b968e2 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.03 07:45:22, skipping insertion in model container [2022-03-03 19:45:22,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.03 07:45:22" (2/2) ... [2022-03-03 19:45:22,658 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2022-03-03 19:45:22,661 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-03 19:45:22,661 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-03 19:45:22,661 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-03 19:45:22,661 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-03 19:45:22,679 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-03 19:45:22,718 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-03 19:45:22,724 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-03 19:45:22,725 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-03 19:45:22,732 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2022-03-03 19:45:22,749 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:22,750 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:22,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-03 19:45:22,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:22,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:22,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:22,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:22,762 INFO L85 PathProgramCache]: Analyzing trace with hash 160243872, now seen corresponding path program 1 times [2022-03-03 19:45:22,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:22,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129865878] [2022-03-03 19:45:22,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:22,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:22,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:22,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129865878] [2022-03-03 19:45:22,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129865878] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:45:22,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:45:22,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-03 19:45:22,906 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411297995] [2022-03-03 19:45:22,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:45:22,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-03 19:45:22,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:22,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-03 19:45:22,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:45:22,946 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 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 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:22,974 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2022-03-03 19:45:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-03 19:45:22,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-03 19:45:22,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:22,996 INFO L225 Difference]: With dead ends: 57 [2022-03-03 19:45:22,996 INFO L226 Difference]: Without dead ends: 50 [2022-03-03 19:45:22,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-03 19:45:22,999 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:23,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-03 19:45:23,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-03-03 19:45:23,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2022-03-03 19:45:23,054 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2022-03-03 19:45:23,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:23,054 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2022-03-03 19:45:23,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,055 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2022-03-03 19:45:23,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:45:23,055 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:23,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:23,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-03 19:45:23,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:23,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:23,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2122570142, now seen corresponding path program 1 times [2022-03-03 19:45:23,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:23,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643192308] [2022-03-03 19:45:23,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:23,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:23,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:23,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643192308] [2022-03-03 19:45:23,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643192308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:23,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205316422] [2022-03-03 19:45:23,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:23,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:23,173 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:23,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-03 19:45:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-03 19:45:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:23,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:23,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205316422] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:23,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-03-03 19:45:23,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2022-03-03 19:45:23,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592468785] [2022-03-03 19:45:23,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:45:23,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:45:23,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:23,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:45:23,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-03-03 19:45:23,478 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:23,596 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2022-03-03 19:45:23,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-03 19:45:23,597 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:45:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:23,602 INFO L225 Difference]: With dead ends: 76 [2022-03-03 19:45:23,602 INFO L226 Difference]: Without dead ends: 76 [2022-03-03 19:45:23,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:45:23,603 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:23,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-03 19:45:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 41. [2022-03-03 19:45:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2022-03-03 19:45:23,610 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2022-03-03 19:45:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:23,610 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2022-03-03 19:45:23,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2022-03-03 19:45:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:45:23,615 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:23,616 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:23,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-03 19:45:23,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:23,832 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:23,832 INFO L85 PathProgramCache]: Analyzing trace with hash 834689058, now seen corresponding path program 1 times [2022-03-03 19:45:23,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:23,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552717414] [2022-03-03 19:45:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:23,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:23,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:23,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:23,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552717414] [2022-03-03 19:45:23,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552717414] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:45:23,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:45:23,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:45:23,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800544648] [2022-03-03 19:45:23,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:45:23,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:45:23,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:23,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:45:23,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:45:23,890 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:23,950 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2022-03-03 19:45:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:45:23,950 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:45:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:23,951 INFO L225 Difference]: With dead ends: 71 [2022-03-03 19:45:23,951 INFO L226 Difference]: Without dead ends: 66 [2022-03-03 19:45:23,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:23,952 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:23,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 31 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-03 19:45:23,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2022-03-03 19:45:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2022-03-03 19:45:23,957 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2022-03-03 19:45:23,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:23,957 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2022-03-03 19:45:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:23,958 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2022-03-03 19:45:23,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:45:23,958 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:23,958 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:23,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-03 19:45:23,958 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:23,959 INFO L85 PathProgramCache]: Analyzing trace with hash -999603742, now seen corresponding path program 2 times [2022-03-03 19:45:23,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:23,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827914440] [2022-03-03 19:45:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:23,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:23,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:23,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827914440] [2022-03-03 19:45:23,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827914440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:45:23,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:45:23,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:45:23,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362050265] [2022-03-03 19:45:23,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:45:23,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:45:23,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:23,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:45:23,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:45:23,997 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:24,041 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2022-03-03 19:45:24,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-03 19:45:24,042 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:45:24,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:24,042 INFO L225 Difference]: With dead ends: 51 [2022-03-03 19:45:24,042 INFO L226 Difference]: Without dead ends: 51 [2022-03-03 19:45:24,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:24,043 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:24,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-03 19:45:24,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-03-03 19:45:24,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2022-03-03 19:45:24,048 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2022-03-03 19:45:24,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:24,048 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2022-03-03 19:45:24,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2022-03-03 19:45:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-03 19:45:24,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:24,049 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:24,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-03 19:45:24,049 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:24,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1331282530, now seen corresponding path program 2 times [2022-03-03 19:45:24,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:24,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660854502] [2022-03-03 19:45:24,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:24,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,081 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:24,081 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660854502] [2022-03-03 19:45:24,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660854502] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-03 19:45:24,081 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-03 19:45:24,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-03 19:45:24,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928182350] [2022-03-03 19:45:24,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-03 19:45:24,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-03 19:45:24,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-03 19:45:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-03 19:45:24,082 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:24,127 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2022-03-03 19:45:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:45:24,128 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-03 19:45:24,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:24,128 INFO L225 Difference]: With dead ends: 51 [2022-03-03 19:45:24,128 INFO L226 Difference]: Without dead ends: 49 [2022-03-03 19:45:24,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-03 19:45:24,129 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:24,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 19 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:24,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-03 19:45:24,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2022-03-03 19:45:24,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2022-03-03 19:45:24,134 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2022-03-03 19:45:24,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:24,134 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2022-03-03 19:45:24,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,134 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2022-03-03 19:45:24,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:45:24,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:24,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:24,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-03 19:45:24,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:24,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:24,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1139591584, now seen corresponding path program 1 times [2022-03-03 19:45:24,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:24,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441112910] [2022-03-03 19:45:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:24,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,258 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:24,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441112910] [2022-03-03 19:45:24,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441112910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:24,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068610156] [2022-03-03 19:45:24,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:24,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:24,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:24,272 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:24,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:45:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:24,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-03 19:45:24,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:24,546 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-03 19:45:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:24,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:24,664 INFO L387 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 9 treesize of output 14 [2022-03-03 19:45:24,681 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-03 19:45:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:24,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068610156] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:24,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:24,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:45:24,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182712879] [2022-03-03 19:45:24,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:24,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:45:24,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:45:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:24,735 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:24,780 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2022-03-03 19:45:24,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:45:24,781 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:45:24,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:24,782 INFO L225 Difference]: With dead ends: 84 [2022-03-03 19:45:24,782 INFO L226 Difference]: Without dead ends: 77 [2022-03-03 19:45:24,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:24,783 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:24,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 20 Unchecked, 0.0s Time] [2022-03-03 19:45:24,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-03 19:45:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2022-03-03 19:45:24,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.9642857142857142) internal successors, (110), 56 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 110 transitions. [2022-03-03 19:45:24,788 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 110 transitions. Word has length 18 [2022-03-03 19:45:24,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:24,788 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 110 transitions. [2022-03-03 19:45:24,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:24,789 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 110 transitions. [2022-03-03 19:45:24,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:45:24,789 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:24,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:24,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:25,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-03 19:45:25,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:25,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2098687768, now seen corresponding path program 2 times [2022-03-03 19:45:25,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:25,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553619397] [2022-03-03 19:45:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:25,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:25,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553619397] [2022-03-03 19:45:25,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553619397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:25,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733311868] [2022-03-03 19:45:25,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:25,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:25,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:25,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:25,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-03 19:45:25,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:25,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:25,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:45:25,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:25,310 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:25,310 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-03 19:45:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:25,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:25,381 INFO L387 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 9 treesize of output 14 [2022-03-03 19:45:25,390 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-03 19:45:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733311868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:25,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:25,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:45:25,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314356918] [2022-03-03 19:45:25,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:25,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:45:25,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:45:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:25,431 INFO L87 Difference]: Start difference. First operand 57 states and 110 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:25,458 INFO L93 Difference]: Finished difference Result 82 states and 153 transitions. [2022-03-03 19:45:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:45:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:45:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:25,459 INFO L225 Difference]: With dead ends: 82 [2022-03-03 19:45:25,459 INFO L226 Difference]: Without dead ends: 79 [2022-03-03 19:45:25,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:25,460 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:25,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 66 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-03-03 19:45:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-03 19:45:25,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2022-03-03 19:45:25,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:25,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2022-03-03 19:45:25,474 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2022-03-03 19:45:25,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:25,474 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2022-03-03 19:45:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2022-03-03 19:45:25,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-03 19:45:25,475 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:25,475 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:25,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:25,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:25,676 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash 402122286, now seen corresponding path program 3 times [2022-03-03 19:45:25,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:25,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764926527] [2022-03-03 19:45:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:25,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:25,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:25,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764926527] [2022-03-03 19:45:25,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764926527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:25,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824448897] [2022-03-03 19:45:25,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:25,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:25,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:25,778 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:25,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-03 19:45:25,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:45:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:25,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:45:25,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:25,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:25,897 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-03-03 19:45:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:25,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:25,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:25,970 INFO L387 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 9 treesize of output 14 [2022-03-03 19:45:25,986 INFO L387 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-03-03 19:45:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:26,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824448897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:26,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:26,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-03-03 19:45:26,041 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543164004] [2022-03-03 19:45:26,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:26,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-03 19:45:26,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:26,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-03 19:45:26,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:26,042 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:26,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:26,086 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2022-03-03 19:45:26,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-03 19:45:26,087 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-03 19:45:26,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:26,088 INFO L225 Difference]: With dead ends: 94 [2022-03-03 19:45:26,088 INFO L226 Difference]: Without dead ends: 87 [2022-03-03 19:45:26,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-03-03 19:45:26,088 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:26,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 54 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-03 19:45:26,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-03 19:45:26,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2022-03-03 19:45:26,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:26,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2022-03-03 19:45:26,105 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2022-03-03 19:45:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:26,106 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2022-03-03 19:45:26,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2022-03-03 19:45:26,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:26,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:26,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:26,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:26,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:26,307 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:26,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:26,307 INFO L85 PathProgramCache]: Analyzing trace with hash 2093142942, now seen corresponding path program 4 times [2022-03-03 19:45:26,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:26,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684863463] [2022-03-03 19:45:26,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:26,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:26,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:26,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684863463] [2022-03-03 19:45:26,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684863463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:26,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287702608] [2022-03-03 19:45:26,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:26,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:26,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:26,403 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:26,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-03 19:45:26,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:26,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:26,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:26,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:26,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287702608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:26,664 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:26,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-03-03 19:45:26,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500477294] [2022-03-03 19:45:26,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:26,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:45:26,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:26,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:45:26,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:45:26,666 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:27,024 INFO L93 Difference]: Finished difference Result 189 states and 352 transitions. [2022-03-03 19:45:27,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:45:27,025 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:45:27,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:27,026 INFO L225 Difference]: With dead ends: 189 [2022-03-03 19:45:27,026 INFO L226 Difference]: Without dead ends: 189 [2022-03-03 19:45:27,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:45:27,027 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 110 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:27,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 143 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:27,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-03 19:45:27,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 73. [2022-03-03 19:45:27,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2022-03-03 19:45:27,030 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2022-03-03 19:45:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:27,030 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2022-03-03 19:45:27,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2022-03-03 19:45:27,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:27,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:27,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:27,051 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-03 19:45:27,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:27,243 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:27,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:27,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1390002466, now seen corresponding path program 5 times [2022-03-03 19:45:27,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:27,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518901875] [2022-03-03 19:45:27,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:27,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:27,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,296 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:27,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518901875] [2022-03-03 19:45:27,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518901875] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:27,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273945099] [2022-03-03 19:45:27,297 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:27,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:27,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:27,312 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:27,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-03 19:45:27,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:27,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:27,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:27,465 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:27,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:27,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273945099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:27,538 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:27,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:45:27,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978040269] [2022-03-03 19:45:27,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:27,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:27,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:27,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:27,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:27,539 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:27,804 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2022-03-03 19:45:27,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:45:27,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:45:27,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:27,806 INFO L225 Difference]: With dead ends: 219 [2022-03-03 19:45:27,806 INFO L226 Difference]: Without dead ends: 205 [2022-03-03 19:45:27,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=535, Unknown=0, NotChecked=0, Total=756 [2022-03-03 19:45:27,807 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 176 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:27,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:27,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-03 19:45:27,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2022-03-03 19:45:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2022-03-03 19:45:27,810 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2022-03-03 19:45:27,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:27,810 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2022-03-03 19:45:27,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:27,811 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2022-03-03 19:45:27,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:27,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:27,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:27,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:28,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:28,020 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1979372002, now seen corresponding path program 6 times [2022-03-03 19:45:28,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:28,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752243106] [2022-03-03 19:45:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:28,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:28,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:28,087 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:28,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752243106] [2022-03-03 19:45:28,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752243106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:28,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644387653] [2022-03-03 19:45:28,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:28,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:28,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:28,089 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:28,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-03 19:45:28,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:28,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:28,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:28,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644387653] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:28,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:28,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2022-03-03 19:45:28,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079679001] [2022-03-03 19:45:28,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:28,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:45:28,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:28,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:45:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:45:28,339 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-03-03 19:45:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:28,640 INFO L93 Difference]: Finished difference Result 245 states and 455 transitions. [2022-03-03 19:45:28,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-03 19:45:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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 20 [2022-03-03 19:45:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:28,642 INFO L225 Difference]: With dead ends: 245 [2022-03-03 19:45:28,642 INFO L226 Difference]: Without dead ends: 245 [2022-03-03 19:45:28,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:45:28,642 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 213 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:28,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 102 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-03 19:45:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 118. [2022-03-03 19:45:28,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:28,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2022-03-03 19:45:28,646 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2022-03-03 19:45:28,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:28,646 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2022-03-03 19:45:28,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 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) [2022-03-03 19:45:28,646 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2022-03-03 19:45:28,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:28,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:28,647 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:28,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-03 19:45:28,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:28,864 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:28,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:28,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1647693214, now seen corresponding path program 7 times [2022-03-03 19:45:28,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:28,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754104226] [2022-03-03 19:45:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:28,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:28,914 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:28,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754104226] [2022-03-03 19:45:28,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754104226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:28,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89670979] [2022-03-03 19:45:28,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:28,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:28,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:28,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-03 19:45:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:28,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:28,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89670979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:29,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:29,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:45:29,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837255933] [2022-03-03 19:45:29,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:29,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:29,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:29,116 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-03 19:45:29,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:29,353 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2022-03-03 19:45:29,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:45:29,354 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20 [2022-03-03 19:45:29,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:29,354 INFO L225 Difference]: With dead ends: 205 [2022-03-03 19:45:29,354 INFO L226 Difference]: Without dead ends: 203 [2022-03-03 19:45:29,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:45:29,355 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 127 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 54 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-03 19:45:29,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2022-03-03 19:45:29,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:29,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2022-03-03 19:45:29,359 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2022-03-03 19:45:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:29,359 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2022-03-03 19:45:29,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-03 19:45:29,359 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2022-03-03 19:45:29,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:29,360 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:29,360 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:29,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:29,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-03 19:45:29,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:29,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash -240395856, now seen corresponding path program 8 times [2022-03-03 19:45:29,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:29,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997625293] [2022-03-03 19:45:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:29,626 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:29,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997625293] [2022-03-03 19:45:29,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997625293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:29,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340388915] [2022-03-03 19:45:29,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:29,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:29,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:29,628 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:29,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-03 19:45:29,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:29,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:29,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:29,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:29,848 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:29,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340388915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:29,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:29,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-03-03 19:45:29,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706220615] [2022-03-03 19:45:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-03 19:45:29,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:29,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-03 19:45:29,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-03-03 19:45:29,850 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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) [2022-03-03 19:45:30,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:30,310 INFO L93 Difference]: Finished difference Result 351 states and 688 transitions. [2022-03-03 19:45:30,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-03 19:45:30,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 20 [2022-03-03 19:45:30,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:30,312 INFO L225 Difference]: With dead ends: 351 [2022-03-03 19:45:30,312 INFO L226 Difference]: Without dead ends: 351 [2022-03-03 19:45:30,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=972, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:45:30,313 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:30,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 131 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:30,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-03 19:45:30,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 165. [2022-03-03 19:45:30,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:30,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2022-03-03 19:45:30,318 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2022-03-03 19:45:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:30,319 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2022-03-03 19:45:30,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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) [2022-03-03 19:45:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2022-03-03 19:45:30,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:30,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:30,319 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:30,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:30,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-03 19:45:30,531 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:30,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:30,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1351610928, now seen corresponding path program 9 times [2022-03-03 19:45:30,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:30,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811324517] [2022-03-03 19:45:30,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:30,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:30,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:30,576 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:30,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811324517] [2022-03-03 19:45:30,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811324517] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:30,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464533988] [2022-03-03 19:45:30,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:30,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:30,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:30,578 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:30,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-03 19:45:30,596 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-03 19:45:30,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:30,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:30,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:30,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:30,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464533988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:30,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:30,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:45:30,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683533785] [2022-03-03 19:45:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:30,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:30,760 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2022-03-03 19:45:30,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:30,948 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2022-03-03 19:45:30,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-03 19:45:30,948 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 20 [2022-03-03 19:45:30,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:30,949 INFO L225 Difference]: With dead ends: 238 [2022-03-03 19:45:30,949 INFO L226 Difference]: Without dead ends: 235 [2022-03-03 19:45:30,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:45:30,949 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 115 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:30,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 60 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:30,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-03-03 19:45:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2022-03-03 19:45:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:30,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2022-03-03 19:45:30,953 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2022-03-03 19:45:30,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:30,953 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2022-03-03 19:45:30,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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) [2022-03-03 19:45:30,954 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2022-03-03 19:45:30,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:30,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:30,954 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:30,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-03-03 19:45:31,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-03 19:45:31,170 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:31,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:31,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1992477080, now seen corresponding path program 10 times [2022-03-03 19:45:31,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:31,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828990667] [2022-03-03 19:45:31,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:31,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:31,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:31,220 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:31,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828990667] [2022-03-03 19:45:31,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828990667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:31,220 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644600867] [2022-03-03 19:45:31,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:31,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:31,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:31,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:31,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-03 19:45:31,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:31,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:31,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:31,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:31,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:31,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:31,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644600867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:31,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:31,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2022-03-03 19:45:31,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712049269] [2022-03-03 19:45:31,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:31,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:31,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:31,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:31,402 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-03 19:45:31,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:31,684 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2022-03-03 19:45:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-03 19:45:31,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 20 [2022-03-03 19:45:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:31,685 INFO L225 Difference]: With dead ends: 302 [2022-03-03 19:45:31,685 INFO L226 Difference]: Without dead ends: 300 [2022-03-03 19:45:31,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=683, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:45:31,686 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:31,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 65 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:31,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-03-03 19:45:31,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2022-03-03 19:45:31,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:31,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2022-03-03 19:45:31,690 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2022-03-03 19:45:31,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:31,690 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2022-03-03 19:45:31,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2022-03-03 19:45:31,690 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2022-03-03 19:45:31,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-03 19:45:31,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:31,691 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:31,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:31,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-03 19:45:31,899 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:31,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:31,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1796143950, now seen corresponding path program 11 times [2022-03-03 19:45:31,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:31,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183464511] [2022-03-03 19:45:31,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:31,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:31,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:31,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183464511] [2022-03-03 19:45:31,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183464511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:31,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271396648] [2022-03-03 19:45:31,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:31,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-03 19:45:31,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:31,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-03 19:45:31,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:32,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:32,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,163 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271396648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:32,163 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:32,163 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-03-03 19:45:32,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905078933] [2022-03-03 19:45:32,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:32,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:32,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:32,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:32,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:32,164 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-03-03 19:45:32,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:32,401 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2022-03-03 19:45:32,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-03 19:45:32,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-03 19:45:32,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:32,402 INFO L225 Difference]: With dead ends: 302 [2022-03-03 19:45:32,402 INFO L226 Difference]: Without dead ends: 296 [2022-03-03 19:45:32,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:45:32,403 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 152 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:32,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 53 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:32,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-03 19:45:32,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2022-03-03 19:45:32,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:32,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2022-03-03 19:45:32,408 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2022-03-03 19:45:32,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:32,408 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2022-03-03 19:45:32,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2022-03-03 19:45:32,408 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2022-03-03 19:45:32,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:32,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:32,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:32,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:32,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-03 19:45:32,620 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:32,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:32,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1370143840, now seen corresponding path program 12 times [2022-03-03 19:45:32,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:32,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160197380] [2022-03-03 19:45:32,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:32,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:32,717 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:32,718 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160197380] [2022-03-03 19:45:32,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160197380] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:32,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294946047] [2022-03-03 19:45:32,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:32,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:32,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:32,722 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:32,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-03 19:45:32,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:32,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:32,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:32,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:32,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:32,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:32,977 INFO L387 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 7 [2022-03-03 19:45:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:33,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:33,144 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:33,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:45:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:33,208 INFO L387 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 20 treesize of output 3 [2022-03-03 19:45:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:33,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294946047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:33,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:33,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:45:33,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959068602] [2022-03-03 19:45:33,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:45:33,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:45:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:33,245 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:33,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:33,341 INFO L93 Difference]: Finished difference Result 270 states and 611 transitions. [2022-03-03 19:45:33,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:45:33,341 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:45:33,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:33,343 INFO L225 Difference]: With dead ends: 270 [2022-03-03 19:45:33,343 INFO L226 Difference]: Without dead ends: 254 [2022-03-03 19:45:33,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:33,344 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:33,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 121 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-03 19:45:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-03 19:45:33,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 221. [2022-03-03 19:45:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.3363636363636364) internal successors, (514), 220 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 514 transitions. [2022-03-03 19:45:33,348 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 514 transitions. Word has length 22 [2022-03-03 19:45:33,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:33,348 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 514 transitions. [2022-03-03 19:45:33,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:33,348 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 514 transitions. [2022-03-03 19:45:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:33,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:33,349 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:33,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:33,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-03 19:45:33,563 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:33,564 INFO L85 PathProgramCache]: Analyzing trace with hash -313455896, now seen corresponding path program 13 times [2022-03-03 19:45:33,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:33,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048376525] [2022-03-03 19:45:33,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:33,673 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:33,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048376525] [2022-03-03 19:45:33,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048376525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:33,673 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001007493] [2022-03-03 19:45:33,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:33,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:33,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:33,684 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:33,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-03 19:45:33,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:33,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:33,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:33,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:33,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:33,935 INFO L387 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 7 [2022-03-03 19:45:33,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:33,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:34,064 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:34,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:45:34,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:34,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:34,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:34,113 INFO L387 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 20 treesize of output 3 [2022-03-03 19:45:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:34,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001007493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:34,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:34,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:45:34,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69988938] [2022-03-03 19:45:34,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:34,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:45:34,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:45:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:34,150 INFO L87 Difference]: Start difference. First operand 221 states and 514 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:34,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:34,214 INFO L93 Difference]: Finished difference Result 263 states and 589 transitions. [2022-03-03 19:45:34,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:45:34,214 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:45:34,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:34,215 INFO L225 Difference]: With dead ends: 263 [2022-03-03 19:45:34,215 INFO L226 Difference]: Without dead ends: 253 [2022-03-03 19:45:34,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:34,216 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:34,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 103 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 119 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-03 19:45:34,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-03 19:45:34,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 212. [2022-03-03 19:45:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.3554502369668247) internal successors, (497), 211 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:34,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 497 transitions. [2022-03-03 19:45:34,220 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 497 transitions. Word has length 22 [2022-03-03 19:45:34,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:34,220 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 497 transitions. [2022-03-03 19:45:34,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 497 transitions. [2022-03-03 19:45:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:34,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:34,221 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:34,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:34,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:34,431 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:34,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1887689564, now seen corresponding path program 14 times [2022-03-03 19:45:34,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:34,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851815208] [2022-03-03 19:45:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:34,519 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:34,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:34,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851815208] [2022-03-03 19:45:34,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851815208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:34,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237556247] [2022-03-03 19:45:34,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:34,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:34,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:34,537 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:34,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-03 19:45:34,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:34,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-03 19:45:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:34,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:34,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:34,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:34,991 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:34,991 INFO L387 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 27 [2022-03-03 19:45:35,089 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:35,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:35,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:35,424 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:35,425 INFO L387 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 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2022-03-03 19:45:35,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:35,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237556247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:35,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:35,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-03 19:45:35,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893868540] [2022-03-03 19:45:35,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:35,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:45:35,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:45:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:45:35,945 INFO L87 Difference]: Start difference. First operand 212 states and 497 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:36,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:36,528 INFO L93 Difference]: Finished difference Result 355 states and 801 transitions. [2022-03-03 19:45:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:45:36,528 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:36,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:36,529 INFO L225 Difference]: With dead ends: 355 [2022-03-03 19:45:36,529 INFO L226 Difference]: Without dead ends: 352 [2022-03-03 19:45:36,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=282, Invalid=1440, Unknown=0, NotChecked=0, Total=1722 [2022-03-03 19:45:36,530 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:36,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 171 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 230 Invalid, 0 Unknown, 221 Unchecked, 0.1s Time] [2022-03-03 19:45:36,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-03 19:45:36,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 228. [2022-03-03 19:45:36,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.33920704845815) internal successors, (531), 227 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:36,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 531 transitions. [2022-03-03 19:45:36,536 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 531 transitions. Word has length 22 [2022-03-03 19:45:36,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:36,536 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 531 transitions. [2022-03-03 19:45:36,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:36,536 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 531 transitions. [2022-03-03 19:45:36,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:36,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:36,536 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:36,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:36,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:36,752 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:36,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:36,752 INFO L85 PathProgramCache]: Analyzing trace with hash 816408682, now seen corresponding path program 15 times [2022-03-03 19:45:36,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:36,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229351169] [2022-03-03 19:45:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:36,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:36,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:36,880 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:36,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229351169] [2022-03-03 19:45:36,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229351169] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:36,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117636757] [2022-03-03 19:45:36,880 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:36,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:36,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:36,882 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:36,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-03 19:45:36,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:45:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-03 19:45:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:37,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:37,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:37,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 35 [2022-03-03 19:45:37,457 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:37,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:37,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:37,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 67 [2022-03-03 19:45:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:38,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117636757] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:38,495 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:38,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 13, 13] total 25 [2022-03-03 19:45:38,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825167974] [2022-03-03 19:45:38,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:38,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:45:38,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:45:38,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:45:38,496 INFO L87 Difference]: Start difference. First operand 228 states and 531 transitions. Second operand has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2022-03-03 19:45:39,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:39,519 INFO L93 Difference]: Finished difference Result 431 states and 961 transitions. [2022-03-03 19:45:39,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:45:39,520 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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 22 [2022-03-03 19:45:39,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:39,521 INFO L225 Difference]: With dead ends: 431 [2022-03-03 19:45:39,521 INFO L226 Difference]: Without dead ends: 413 [2022-03-03 19:45:39,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 23 SyntacticMatches, 8 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=399, Invalid=2253, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:45:39,522 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 108 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 412 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:39,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 162 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 329 Invalid, 0 Unknown, 412 Unchecked, 0.2s Time] [2022-03-03 19:45:39,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-03-03 19:45:39,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 259. [2022-03-03 19:45:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.317829457364341) internal successors, (598), 258 states have internal predecessors, (598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 598 transitions. [2022-03-03 19:45:39,530 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 598 transitions. Word has length 22 [2022-03-03 19:45:39,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:39,530 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 598 transitions. [2022-03-03 19:45:39,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 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) [2022-03-03 19:45:39,530 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 598 transitions. [2022-03-03 19:45:39,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:39,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:39,531 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:39,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:39,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:39,732 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:39,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:39,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1928000206, now seen corresponding path program 16 times [2022-03-03 19:45:39,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:39,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748648194] [2022-03-03 19:45:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:39,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:39,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:39,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748648194] [2022-03-03 19:45:39,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748648194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:39,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109943922] [2022-03-03 19:45:39,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:39,847 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:39,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-03 19:45:39,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:39,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:39,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:39,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:40,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,064 INFO L387 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 7 [2022-03-03 19:45:40,092 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:40,194 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:40,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:45:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:40,244 INFO L387 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 20 treesize of output 3 [2022-03-03 19:45:40,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109943922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:40,291 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:40,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 19:45:40,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699116411] [2022-03-03 19:45:40,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:40,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:40,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:40,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:40,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:40,292 INFO L87 Difference]: Start difference. First operand 259 states and 598 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2022-03-03 19:45:40,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:40,401 INFO L93 Difference]: Finished difference Result 334 states and 733 transitions. [2022-03-03 19:45:40,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:45:40,401 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 [2022-03-03 19:45:40,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:40,402 INFO L225 Difference]: With dead ends: 334 [2022-03-03 19:45:40,402 INFO L226 Difference]: Without dead ends: 311 [2022-03-03 19:45:40,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:40,403 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:40,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 109 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2022-03-03 19:45:40,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-03-03 19:45:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 268. [2022-03-03 19:45:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.3183520599250937) internal successors, (619), 267 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:40,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 619 transitions. [2022-03-03 19:45:40,408 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 619 transitions. Word has length 22 [2022-03-03 19:45:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:40,408 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 619 transitions. [2022-03-03 19:45:40,408 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2022-03-03 19:45:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 619 transitions. [2022-03-03 19:45:40,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:40,409 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:40,409 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:40,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:40,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:40,619 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:40,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash -871312262, now seen corresponding path program 17 times [2022-03-03 19:45:40,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:40,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419707947] [2022-03-03 19:45:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:40,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:40,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,712 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:40,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419707947] [2022-03-03 19:45:40,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419707947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:40,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152259721] [2022-03-03 19:45:40,712 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:40,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:40,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:40,713 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:40,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-03 19:45:40,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-03 19:45:40,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:40,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:40,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:40,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:40,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,871 INFO L387 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 7 [2022-03-03 19:45:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:40,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:40,966 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:40,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:45:40,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:40,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:41,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:41,000 INFO L387 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 20 treesize of output 3 [2022-03-03 19:45:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152259721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:41,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:41,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-03-03 19:45:41,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180396704] [2022-03-03 19:45:41,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:41,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-03 19:45:41,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-03 19:45:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:41,037 INFO L87 Difference]: Start difference. First operand 268 states and 619 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:41,123 INFO L93 Difference]: Finished difference Result 329 states and 720 transitions. [2022-03-03 19:45:41,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-03 19:45:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-03 19:45:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:41,124 INFO L225 Difference]: With dead ends: 329 [2022-03-03 19:45:41,124 INFO L226 Difference]: Without dead ends: 326 [2022-03-03 19:45:41,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 31 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-03-03 19:45:41,125 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 62 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:41,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 119 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 210 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-03 19:45:41,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-03 19:45:41,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 264. [2022-03-03 19:45:41,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.32319391634981) internal successors, (611), 263 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:41,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 611 transitions. [2022-03-03 19:45:41,130 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 611 transitions. Word has length 22 [2022-03-03 19:45:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:41,130 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 611 transitions. [2022-03-03 19:45:41,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:41,130 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 611 transitions. [2022-03-03 19:45:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-03 19:45:41,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:41,131 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:41,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:41,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:41,332 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:41,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash 962650606, now seen corresponding path program 18 times [2022-03-03 19:45:41,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:41,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335480319] [2022-03-03 19:45:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,432 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:41,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335480319] [2022-03-03 19:45:41,432 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335480319] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:41,432 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519401922] [2022-03-03 19:45:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:41,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:41,444 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:41,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-03 19:45:41,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:41,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-03 19:45:41,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:41,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-03 19:45:41,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:41,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:41,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:41,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:41,705 INFO L387 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 7 [2022-03-03 19:45:41,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:41,785 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-03 19:45:41,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 20 treesize of output 45 [2022-03-03 19:45:41,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:41,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:41,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:41,848 INFO L387 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 20 treesize of output 3 [2022-03-03 19:45:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:41,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519401922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:41,896 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:41,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-03-03 19:45:41,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771483216] [2022-03-03 19:45:41,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:41,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-03 19:45:41,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:41,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-03 19:45:41,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:41,897 INFO L87 Difference]: Start difference. First operand 264 states and 611 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-03-03 19:45:42,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:42,049 INFO L93 Difference]: Finished difference Result 357 states and 781 transitions. [2022-03-03 19:45:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-03 19:45:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 22 [2022-03-03 19:45:42,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:42,050 INFO L225 Difference]: With dead ends: 357 [2022-03-03 19:45:42,050 INFO L226 Difference]: Without dead ends: 350 [2022-03-03 19:45:42,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-03 19:45:42,051 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:42,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 150 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-03 19:45:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 283. [2022-03-03 19:45:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.3297872340425534) internal successors, (657), 282 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 657 transitions. [2022-03-03 19:45:42,056 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 657 transitions. Word has length 22 [2022-03-03 19:45:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:42,056 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 657 transitions. [2022-03-03 19:45:42,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2022-03-03 19:45:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 657 transitions. [2022-03-03 19:45:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:42,057 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:42,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:42,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:42,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:42,269 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:42,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:42,270 INFO L85 PathProgramCache]: Analyzing trace with hash 419045022, now seen corresponding path program 19 times [2022-03-03 19:45:42,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:42,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709225354] [2022-03-03 19:45:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:42,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:42,332 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:42,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709225354] [2022-03-03 19:45:42,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709225354] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:42,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875629885] [2022-03-03 19:45:42,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:42,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:42,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:42,334 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:42,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-03 19:45:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:42,455 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:42,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:42,551 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:42,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875629885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:42,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:42,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-03 19:45:42,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328603046] [2022-03-03 19:45:42,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:42,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:42,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:42,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:42,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:42,553 INFO L87 Difference]: Start difference. First operand 283 states and 657 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) 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) [2022-03-03 19:45:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:43,031 INFO L93 Difference]: Finished difference Result 565 states and 1194 transitions. [2022-03-03 19:45:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-03 19:45:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) 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 24 [2022-03-03 19:45:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:43,034 INFO L225 Difference]: With dead ends: 565 [2022-03-03 19:45:43,035 INFO L226 Difference]: Without dead ends: 565 [2022-03-03 19:45:43,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=652, Invalid=1798, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:45:43,036 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 186 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:43,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 135 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:43,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2022-03-03 19:45:43,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 261. [2022-03-03 19:45:43,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.330769230769231) internal successors, (606), 260 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 606 transitions. [2022-03-03 19:45:43,042 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 606 transitions. Word has length 24 [2022-03-03 19:45:43,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:43,042 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 606 transitions. [2022-03-03 19:45:43,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) 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) [2022-03-03 19:45:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 606 transitions. [2022-03-03 19:45:43,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:43,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:43,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:43,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:43,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-03 19:45:43,244 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -989086942, now seen corresponding path program 20 times [2022-03-03 19:45:43,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:43,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329303436] [2022-03-03 19:45:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:43,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:43,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329303436] [2022-03-03 19:45:43,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329303436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:43,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017125569] [2022-03-03 19:45:43,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:43,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:43,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:43,308 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:43,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-03 19:45:43,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:43,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:43,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:43,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:43,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:43,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017125569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:43,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:43,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-03 19:45:43,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405900044] [2022-03-03 19:45:43,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:43,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:43,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:43,588 INFO L87 Difference]: Start difference. First operand 261 states and 606 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:44,142 INFO L93 Difference]: Finished difference Result 727 states and 1493 transitions. [2022-03-03 19:45:44,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:45:44,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:44,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:44,144 INFO L225 Difference]: With dead ends: 727 [2022-03-03 19:45:44,144 INFO L226 Difference]: Without dead ends: 683 [2022-03-03 19:45:44,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1508, Unknown=0, NotChecked=0, Total=2070 [2022-03-03 19:45:44,145 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 270 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:44,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 134 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:44,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-03-03 19:45:44,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 317. [2022-03-03 19:45:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.3512658227848102) internal successors, (743), 316 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 743 transitions. [2022-03-03 19:45:44,153 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 743 transitions. Word has length 24 [2022-03-03 19:45:44,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:44,153 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 743 transitions. [2022-03-03 19:45:44,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 743 transitions. [2022-03-03 19:45:44,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:44,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:44,154 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:44,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:44,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-03 19:45:44,354 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:44,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:44,355 INFO L85 PathProgramCache]: Analyzing trace with hash 867513058, now seen corresponding path program 21 times [2022-03-03 19:45:44,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:44,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129006937] [2022-03-03 19:45:44,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:44,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:44,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:44,408 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:44,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129006937] [2022-03-03 19:45:44,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129006937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:44,408 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343124299] [2022-03-03 19:45:44,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:44,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:44,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:44,409 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:44,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-03 19:45:44,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:45:44,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:44,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:44,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:44,571 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:44,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:44,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343124299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:44,694 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:44,694 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 20 [2022-03-03 19:45:44,694 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623853191] [2022-03-03 19:45:44,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:44,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:44,694 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:44,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:44,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:44,695 INFO L87 Difference]: Start difference. First operand 317 states and 743 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-03 19:45:45,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:45,310 INFO L93 Difference]: Finished difference Result 759 states and 1599 transitions. [2022-03-03 19:45:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:45:45,310 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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 24 [2022-03-03 19:45:45,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:45,313 INFO L225 Difference]: With dead ends: 759 [2022-03-03 19:45:45,313 INFO L226 Difference]: Without dead ends: 757 [2022-03-03 19:45:45,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2114, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:45:45,314 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 302 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:45,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 159 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-03 19:45:45,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 385. [2022-03-03 19:45:45,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3984375) internal successors, (921), 384 states have internal predecessors, (921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:45,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 921 transitions. [2022-03-03 19:45:45,323 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 921 transitions. Word has length 24 [2022-03-03 19:45:45,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:45,323 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 921 transitions. [2022-03-03 19:45:45,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 20 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) [2022-03-03 19:45:45,323 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 921 transitions. [2022-03-03 19:45:45,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:45,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:45,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:45,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:45,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-03 19:45:45,539 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:45,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:45,539 INFO L85 PathProgramCache]: Analyzing trace with hash 535834270, now seen corresponding path program 22 times [2022-03-03 19:45:45,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:45,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893429618] [2022-03-03 19:45:45,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:45,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,589 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:45,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893429618] [2022-03-03 19:45:45,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893429618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:45,589 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873664729] [2022-03-03 19:45:45,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:45,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:45,590 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:45,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-03 19:45:45,609 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:45,742 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:45,842 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:45,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873664729] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:45,843 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:45,843 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-03 19:45:45,843 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683473845] [2022-03-03 19:45:45,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:45,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:45,843 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:45,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:45,844 INFO L87 Difference]: Start difference. First operand 385 states and 921 transitions. Second operand has 20 states, 20 states have (on average 2.5) 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) [2022-03-03 19:45:46,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:46,190 INFO L93 Difference]: Finished difference Result 562 states and 1252 transitions. [2022-03-03 19:45:46,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-03 19:45:46,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) 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 24 [2022-03-03 19:45:46,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:46,192 INFO L225 Difference]: With dead ends: 562 [2022-03-03 19:45:46,192 INFO L226 Difference]: Without dead ends: 558 [2022-03-03 19:45:46,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=539, Invalid=1267, Unknown=0, NotChecked=0, Total=1806 [2022-03-03 19:45:46,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:46,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 77 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:46,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2022-03-03 19:45:46,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 385. [2022-03-03 19:45:46,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 384 states have (on average 2.3958333333333335) internal successors, (920), 384 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:46,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 920 transitions. [2022-03-03 19:45:46,201 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 920 transitions. Word has length 24 [2022-03-03 19:45:46,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:46,201 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 920 transitions. [2022-03-03 19:45:46,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) 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) [2022-03-03 19:45:46,201 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 920 transitions. [2022-03-03 19:45:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:46,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:46,202 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:46,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:46,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:46,418 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:46,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:46,418 INFO L85 PathProgramCache]: Analyzing trace with hash 48878956, now seen corresponding path program 23 times [2022-03-03 19:45:46,418 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:46,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128129782] [2022-03-03 19:45:46,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:46,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:46,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:46,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:46,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:46,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128129782] [2022-03-03 19:45:46,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128129782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:46,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589777925] [2022-03-03 19:45:46,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:46,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:46,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:46,492 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:46,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-03 19:45:46,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:45:46,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:46,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:46,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:46,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:46,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589777925] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:46,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:46,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-03 19:45:46,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020881345] [2022-03-03 19:45:46,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:46,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:46,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:46,749 INFO L87 Difference]: Start difference. First operand 385 states and 920 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-03-03 19:45:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:47,180 INFO L93 Difference]: Finished difference Result 616 states and 1364 transitions. [2022-03-03 19:45:47,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:45:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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 24 [2022-03-03 19:45:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:47,182 INFO L225 Difference]: With dead ends: 616 [2022-03-03 19:45:47,182 INFO L226 Difference]: Without dead ends: 607 [2022-03-03 19:45:47,183 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:45:47,183 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:47,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 102 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2022-03-03 19:45:47,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 406. [2022-03-03 19:45:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.417283950617284) internal successors, (979), 405 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 979 transitions. [2022-03-03 19:45:47,193 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 979 transitions. Word has length 24 [2022-03-03 19:45:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 979 transitions. [2022-03-03 19:45:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 19 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) [2022-03-03 19:45:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 979 transitions. [2022-03-03 19:45:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:47,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:47,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:47,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:47,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-03 19:45:47,409 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:47,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:47,410 INFO L85 PathProgramCache]: Analyzing trace with hash 493411978, now seen corresponding path program 24 times [2022-03-03 19:45:47,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:47,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874251056] [2022-03-03 19:45:47,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:47,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:47,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:47,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:47,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874251056] [2022-03-03 19:45:47,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874251056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:47,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853957326] [2022-03-03 19:45:47,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:47,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:47,472 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:47,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-03 19:45:47,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:45:47,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:47,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:47,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:47,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853957326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:47,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:47,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-03 19:45:47,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873625514] [2022-03-03 19:45:47,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:47,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:47,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:47,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:47,736 INFO L87 Difference]: Start difference. First operand 406 states and 979 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-03-03 19:45:48,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:48,140 INFO L93 Difference]: Finished difference Result 736 states and 1626 transitions. [2022-03-03 19:45:48,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:45:48,141 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 24 [2022-03-03 19:45:48,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:48,143 INFO L225 Difference]: With dead ends: 736 [2022-03-03 19:45:48,143 INFO L226 Difference]: Without dead ends: 722 [2022-03-03 19:45:48,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2022-03-03 19:45:48,148 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 187 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:48,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 97 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:48,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-03 19:45:48,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 409. [2022-03-03 19:45:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.411764705882353) internal successors, (984), 408 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 984 transitions. [2022-03-03 19:45:48,158 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 984 transitions. Word has length 24 [2022-03-03 19:45:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:48,159 INFO L470 AbstractCegarLoop]: Abstraction has 409 states and 984 transitions. [2022-03-03 19:45:48,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-03-03 19:45:48,159 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 984 transitions. [2022-03-03 19:45:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:48,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:48,160 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:48,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:48,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-03 19:45:48,375 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:48,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1128304716, now seen corresponding path program 25 times [2022-03-03 19:45:48,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:48,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922140819] [2022-03-03 19:45:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:48,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:48,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922140819] [2022-03-03 19:45:48,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922140819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:48,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645616541] [2022-03-03 19:45:48,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:48,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:48,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:48,441 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:48,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-03 19:45:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:48,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:48,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:48,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:48,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:48,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645616541] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:48,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:48,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-03 19:45:48,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106872343] [2022-03-03 19:45:48,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:48,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:48,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:48,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:48,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:48,618 INFO L87 Difference]: Start difference. First operand 409 states and 984 transitions. Second operand has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:49,237 INFO L93 Difference]: Finished difference Result 923 states and 1981 transitions. [2022-03-03 19:45:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:45:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:49,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:49,240 INFO L225 Difference]: With dead ends: 923 [2022-03-03 19:45:49,240 INFO L226 Difference]: Without dead ends: 923 [2022-03-03 19:45:49,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=2047, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:45:49,241 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:49,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 192 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:49,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2022-03-03 19:45:49,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 431. [2022-03-03 19:45:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.386046511627907) internal successors, (1026), 430 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1026 transitions. [2022-03-03 19:45:49,261 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1026 transitions. Word has length 24 [2022-03-03 19:45:49,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:49,261 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1026 transitions. [2022-03-03 19:45:49,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:49,261 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1026 transitions. [2022-03-03 19:45:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:49,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:49,262 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:49,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:49,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:49,473 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:49,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:49,473 INFO L85 PathProgramCache]: Analyzing trace with hash -218142668, now seen corresponding path program 26 times [2022-03-03 19:45:49,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:49,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810524419] [2022-03-03 19:45:49,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:49,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:49,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:49,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810524419] [2022-03-03 19:45:49,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810524419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:49,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949479560] [2022-03-03 19:45:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:49,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:49,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:49,540 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:49,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-03 19:45:49,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:49,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:49,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:49,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:49,800 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:49,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949479560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:49,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:49,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-03 19:45:49,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157273158] [2022-03-03 19:45:49,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:49,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:49,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:49,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:49,801 INFO L87 Difference]: Start difference. First operand 431 states and 1026 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) [2022-03-03 19:45:50,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:50,196 INFO L93 Difference]: Finished difference Result 601 states and 1312 transitions. [2022-03-03 19:45:50,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-03 19:45:50,196 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 24 [2022-03-03 19:45:50,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:50,198 INFO L225 Difference]: With dead ends: 601 [2022-03-03 19:45:50,198 INFO L226 Difference]: Without dead ends: 583 [2022-03-03 19:45:50,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=403, Invalid=1079, Unknown=0, NotChecked=0, Total=1482 [2022-03-03 19:45:50,198 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 227 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:50,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 109 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:50,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-03-03 19:45:50,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 431. [2022-03-03 19:45:50,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.3767441860465115) internal successors, (1022), 430 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:50,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1022 transitions. [2022-03-03 19:45:50,206 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1022 transitions. Word has length 24 [2022-03-03 19:45:50,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:50,206 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1022 transitions. [2022-03-03 19:45:50,206 INFO L471 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) [2022-03-03 19:45:50,206 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1022 transitions. [2022-03-03 19:45:50,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:50,207 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:50,207 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:50,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:50,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:50,424 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:50,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:50,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1556407664, now seen corresponding path program 27 times [2022-03-03 19:45:50,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:50,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451626866] [2022-03-03 19:45:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:50,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:50,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:50,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451626866] [2022-03-03 19:45:50,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451626866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:50,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231275098] [2022-03-03 19:45:50,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:50,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:50,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:50,481 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:50,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-03 19:45:50,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:45:50,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:50,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:50,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:50,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:50,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231275098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:50,806 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:50,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 20 [2022-03-03 19:45:50,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722838990] [2022-03-03 19:45:50,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:50,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-03 19:45:50,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:50,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-03 19:45:50,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2022-03-03 19:45:50,807 INFO L87 Difference]: Start difference. First operand 431 states and 1022 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:51,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:51,542 INFO L93 Difference]: Finished difference Result 1092 states and 2410 transitions. [2022-03-03 19:45:51,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:45:51,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:51,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:51,545 INFO L225 Difference]: With dead ends: 1092 [2022-03-03 19:45:51,545 INFO L226 Difference]: Without dead ends: 1092 [2022-03-03 19:45:51,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1165, Invalid=2741, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:45:51,547 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 293 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:51,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 143 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-03-03 19:45:51,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 664. [2022-03-03 19:45:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4630467571644044) internal successors, (1633), 663 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) [2022-03-03 19:45:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1633 transitions. [2022-03-03 19:45:51,559 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1633 transitions. Word has length 24 [2022-03-03 19:45:51,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:51,560 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1633 transitions. [2022-03-03 19:45:51,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1633 transitions. [2022-03-03 19:45:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:51,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:51,561 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:51,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:51,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:51,776 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:51,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:51,776 INFO L85 PathProgramCache]: Analyzing trace with hash -195673560, now seen corresponding path program 28 times [2022-03-03 19:45:51,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:51,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652112629] [2022-03-03 19:45:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:51,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:51,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652112629] [2022-03-03 19:45:51,822 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652112629] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:51,822 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174517269] [2022-03-03 19:45:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:45:51,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:51,823 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:51,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-03 19:45:51,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:45:51,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:51,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:51,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:51,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:52,075 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:52,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174517269] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:52,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:52,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 19 [2022-03-03 19:45:52,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343092227] [2022-03-03 19:45:52,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:52,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:52,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:52,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:52,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:52,077 INFO L87 Difference]: Start difference. First operand 664 states and 1633 transitions. Second operand has 20 states, 20 states have (on average 2.5) 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) [2022-03-03 19:45:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:52,651 INFO L93 Difference]: Finished difference Result 945 states and 2149 transitions. [2022-03-03 19:45:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:45:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) 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 24 [2022-03-03 19:45:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:52,654 INFO L225 Difference]: With dead ends: 945 [2022-03-03 19:45:52,654 INFO L226 Difference]: Without dead ends: 941 [2022-03-03 19:45:52,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=1726, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:45:52,655 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 230 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:52,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 76 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:45:52,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2022-03-03 19:45:52,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 664. [2022-03-03 19:45:52,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 2.4585218702865763) internal successors, (1630), 663 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:52,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 1630 transitions. [2022-03-03 19:45:52,666 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 1630 transitions. Word has length 24 [2022-03-03 19:45:52,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:52,667 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 1630 transitions. [2022-03-03 19:45:52,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) 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) [2022-03-03 19:45:52,667 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 1630 transitions. [2022-03-03 19:45:52,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:52,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:52,668 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:52,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:52,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:52,881 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:52,881 INFO L85 PathProgramCache]: Analyzing trace with hash -702019826, now seen corresponding path program 29 times [2022-03-03 19:45:52,881 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:52,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920897774] [2022-03-03 19:45:52,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:52,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:45:52,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:52,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920897774] [2022-03-03 19:45:52,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920897774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:52,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308666678] [2022-03-03 19:45:52,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:45:52,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:52,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:52,937 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:52,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-03 19:45:52,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:45:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:52,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:53,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:53,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308666678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:53,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:53,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-03-03 19:45:53,150 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361098801] [2022-03-03 19:45:53,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:53,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:53,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:53,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:53,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:53,151 INFO L87 Difference]: Start difference. First operand 664 states and 1630 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-03-03 19:45:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:53,574 INFO L93 Difference]: Finished difference Result 1032 states and 2346 transitions. [2022-03-03 19:45:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-03 19:45:53,580 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 24 [2022-03-03 19:45:53,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:53,583 INFO L225 Difference]: With dead ends: 1032 [2022-03-03 19:45:53,583 INFO L226 Difference]: Without dead ends: 1020 [2022-03-03 19:45:53,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=657, Invalid=1599, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:45:53,584 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:53,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 75 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:53,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-03-03 19:45:53,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 715. [2022-03-03 19:45:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 715 states, 714 states have (on average 2.4747899159663866) internal successors, (1767), 714 states have internal predecessors, (1767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:53,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 715 states to 715 states and 1767 transitions. [2022-03-03 19:45:53,620 INFO L78 Accepts]: Start accepts. Automaton has 715 states and 1767 transitions. Word has length 24 [2022-03-03 19:45:53,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 715 states and 1767 transitions. [2022-03-03 19:45:53,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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) [2022-03-03 19:45:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 715 states and 1767 transitions. [2022-03-03 19:45:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-03 19:45:53,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:53,621 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:53,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:53,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-03 19:45:53,835 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:53,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:53,836 INFO L85 PathProgramCache]: Analyzing trace with hash -929241206, now seen corresponding path program 30 times [2022-03-03 19:45:53,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:53,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437665009] [2022-03-03 19:45:53,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:53,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:53,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:53,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:53,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437665009] [2022-03-03 19:45:53,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437665009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:53,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164224632] [2022-03-03 19:45:53,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:45:53,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:53,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:53,897 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:53,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-03 19:45:53,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:45:53,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:53,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-03 19:45:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:54,099 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164224632] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:54,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:54,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-03-03 19:45:54,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220529935] [2022-03-03 19:45:54,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-03 19:45:54,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:54,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-03 19:45:54,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-03-03 19:45:54,100 INFO L87 Difference]: Start difference. First operand 715 states and 1767 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:54,493 INFO L93 Difference]: Finished difference Result 1063 states and 2453 transitions. [2022-03-03 19:45:54,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-03 19:45:54,493 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-03 19:45:54,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:54,496 INFO L225 Difference]: With dead ends: 1063 [2022-03-03 19:45:54,496 INFO L226 Difference]: Without dead ends: 1043 [2022-03-03 19:45:54,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 534 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1423, Unknown=0, NotChecked=0, Total=1980 [2022-03-03 19:45:54,499 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:54,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 73 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:45:54,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-03-03 19:45:54,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 771. [2022-03-03 19:45:54,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.4883116883116885) internal successors, (1916), 770 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1916 transitions. [2022-03-03 19:45:54,516 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1916 transitions. Word has length 24 [2022-03-03 19:45:54,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:54,516 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 1916 transitions. [2022-03-03 19:45:54,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 19 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1916 transitions. [2022-03-03 19:45:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:45:54,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:54,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:54,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:54,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:54,731 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:54,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:54,732 INFO L85 PathProgramCache]: Analyzing trace with hash 434491040, now seen corresponding path program 31 times [2022-03-03 19:45:54,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:54,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143677199] [2022-03-03 19:45:54,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:54,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:54,963 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:54,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143677199] [2022-03-03 19:45:54,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143677199] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:54,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196533919] [2022-03-03 19:45:54,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:45:54,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:54,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:54,964 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:54,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-03 19:45:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:54,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:45:54,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:55,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:45:55,295 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:55,536 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:45:55,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:45:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:55,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:55,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:45:55,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:55,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196533919] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:55,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:55,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:45:55,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065459498] [2022-03-03 19:45:55,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:55,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:45:55,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:55,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:45:55,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:45:55,760 INFO L87 Difference]: Start difference. First operand 771 states and 1916 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:56,485 INFO L93 Difference]: Finished difference Result 1161 states and 2807 transitions. [2022-03-03 19:45:56,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:45:56,485 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:56,488 INFO L225 Difference]: With dead ends: 1161 [2022-03-03 19:45:56,488 INFO L226 Difference]: Without dead ends: 1154 [2022-03-03 19:45:56,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:45:56,489 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:56,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 138 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 330 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-03 19:45:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2022-03-03 19:45:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 819. [2022-03-03 19:45:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 2.4731051344743276) internal successors, (2023), 818 states have internal predecessors, (2023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:56,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2023 transitions. [2022-03-03 19:45:56,503 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2023 transitions. Word has length 26 [2022-03-03 19:45:56,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:56,503 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2023 transitions. [2022-03-03 19:45:56,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2023 transitions. [2022-03-03 19:45:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:45:56,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:56,504 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:56,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-03 19:45:56,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:56,720 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:56,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1491178984, now seen corresponding path program 32 times [2022-03-03 19:45:56,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:56,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279570765] [2022-03-03 19:45:56,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:56,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:56,972 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:56,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279570765] [2022-03-03 19:45:56,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279570765] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:56,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152655948] [2022-03-03 19:45:56,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:45:56,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:56,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:56,976 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:56,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-03 19:45:56,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:45:56,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:56,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:45:56,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:57,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:57,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:57,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:45:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:57,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:45:57,477 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:45:57,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:45:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:57,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:57,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:57,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:45:57,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:57,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152655948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:45:57,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:45:57,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:45:57,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100240551] [2022-03-03 19:45:57,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:45:57,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:45:57,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:45:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:45:57,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:45:57,622 INFO L87 Difference]: Start difference. First operand 819 states and 2023 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:58,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:45:58,504 INFO L93 Difference]: Finished difference Result 1175 states and 2816 transitions. [2022-03-03 19:45:58,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-03 19:45:58,505 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:45:58,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:45:58,508 INFO L225 Difference]: With dead ends: 1175 [2022-03-03 19:45:58,508 INFO L226 Difference]: Without dead ends: 1172 [2022-03-03 19:45:58,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2022-03-03 19:45:58,509 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 106 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:45:58,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 140 Invalid, 509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 380 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-03 19:45:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2022-03-03 19:45:58,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 815. [2022-03-03 19:45:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 2.4754299754299756) internal successors, (2015), 814 states have internal predecessors, (2015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2015 transitions. [2022-03-03 19:45:58,538 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2015 transitions. Word has length 26 [2022-03-03 19:45:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:45:58,538 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2015 transitions. [2022-03-03 19:45:58,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:45:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2015 transitions. [2022-03-03 19:45:58,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:45:58,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:45:58,540 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:45:58,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-03-03 19:45:58,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-03 19:45:58,756 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:45:58,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:45:58,756 INFO L85 PathProgramCache]: Analyzing trace with hash -83054684, now seen corresponding path program 33 times [2022-03-03 19:45:58,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:45:58,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097309755] [2022-03-03 19:45:58,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:45:58,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:45:58,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:45:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:58,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:45:58,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097309755] [2022-03-03 19:45:58,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097309755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:45:58,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843168333] [2022-03-03 19:45:58,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:45:58,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:45:58,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:45:58,996 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:45:58,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-03 19:45:59,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:45:59,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:45:59,016 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:45:59,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:45:59,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:45:59,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:59,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:45:59,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:45:59,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-03 19:45:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:45:59,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:00,393 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-03 19:46:00,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-03 19:46:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:04,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843168333] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:04,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:04,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-03 19:46:04,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999473802] [2022-03-03 19:46:04,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:04,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:46:04,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:04,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:46:04,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=994, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:46:04,378 INFO L87 Difference]: Start difference. First operand 815 states and 2015 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:05,528 INFO L93 Difference]: Finished difference Result 1194 states and 2858 transitions. [2022-03-03 19:46:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:46:05,528 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:05,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:05,532 INFO L225 Difference]: With dead ends: 1194 [2022-03-03 19:46:05,532 INFO L226 Difference]: Without dead ends: 1188 [2022-03-03 19:46:05,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=342, Invalid=2850, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:46:05,534 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 469 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:05,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 199 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 396 Invalid, 0 Unknown, 469 Unchecked, 0.2s Time] [2022-03-03 19:46:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2022-03-03 19:46:05,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 857. [2022-03-03 19:46:05,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 2.4661214953271027) internal successors, (2111), 856 states have internal predecessors, (2111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:05,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 2111 transitions. [2022-03-03 19:46:05,547 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 2111 transitions. Word has length 26 [2022-03-03 19:46:05,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:05,547 INFO L470 AbstractCegarLoop]: Abstraction has 857 states and 2111 transitions. [2022-03-03 19:46:05,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 2111 transitions. [2022-03-03 19:46:05,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:05,548 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:05,548 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:05,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:05,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-03 19:46:05,763 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:05,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:05,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1093121440, now seen corresponding path program 34 times [2022-03-03 19:46:05,763 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:05,763 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981666119] [2022-03-03 19:46:05,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:05,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:06,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:06,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981666119] [2022-03-03 19:46:06,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981666119] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:06,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761251796] [2022-03-03 19:46:06,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:06,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:06,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:06,013 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:06,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-03 19:46:06,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:06,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:06,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:06,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:06,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:06,477 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:06,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:06,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:06,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:06,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:06,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:06,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761251796] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:06,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:06,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:06,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658641069] [2022-03-03 19:46:06,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:06,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:06,648 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:06,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:06,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:06,649 INFO L87 Difference]: Start difference. First operand 857 states and 2111 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:07,556 INFO L93 Difference]: Finished difference Result 1262 states and 3022 transitions. [2022-03-03 19:46:07,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:46:07,556 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:07,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:07,560 INFO L225 Difference]: With dead ends: 1262 [2022-03-03 19:46:07,560 INFO L226 Difference]: Without dead ends: 1259 [2022-03-03 19:46:07,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=310, Invalid=2240, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:46:07,564 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 82 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:07,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 172 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 607 Invalid, 0 Unknown, 271 Unchecked, 0.2s Time] [2022-03-03 19:46:07,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1259 states. [2022-03-03 19:46:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1259 to 863. [2022-03-03 19:46:07,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 2.4628770301624128) internal successors, (2123), 862 states have internal predecessors, (2123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2123 transitions. [2022-03-03 19:46:07,577 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2123 transitions. Word has length 26 [2022-03-03 19:46:07,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:07,577 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2123 transitions. [2022-03-03 19:46:07,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:07,578 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2123 transitions. [2022-03-03 19:46:07,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:07,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:07,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:07,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:07,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-03 19:46:07,794 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:07,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:07,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1170935528, now seen corresponding path program 35 times [2022-03-03 19:46:07,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:07,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485153011] [2022-03-03 19:46:07,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:07,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:08,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:08,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485153011] [2022-03-03 19:46:08,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485153011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:08,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197826106] [2022-03-03 19:46:08,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:08,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:08,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:08,035 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:08,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-03 19:46:08,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:46:08,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:08,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:08,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:08,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:08,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:08,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:08,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:08,453 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:08,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:08,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:08,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:08,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:08,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:08,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197826106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:08,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:08,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:08,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686602271] [2022-03-03 19:46:08,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:08,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:08,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:08,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:08,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:08,633 INFO L87 Difference]: Start difference. First operand 863 states and 2123 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:09,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:09,562 INFO L93 Difference]: Finished difference Result 1252 states and 2968 transitions. [2022-03-03 19:46:09,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:46:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:09,565 INFO L225 Difference]: With dead ends: 1252 [2022-03-03 19:46:09,565 INFO L226 Difference]: Without dead ends: 1249 [2022-03-03 19:46:09,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=335, Invalid=2317, Unknown=0, NotChecked=0, Total=2652 [2022-03-03 19:46:09,566 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 119 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:09,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 146 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 418 Invalid, 0 Unknown, 235 Unchecked, 0.2s Time] [2022-03-03 19:46:09,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1249 states. [2022-03-03 19:46:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1249 to 861. [2022-03-03 19:46:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 861 states, 860 states have (on average 2.4651162790697674) internal successors, (2120), 860 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 861 states to 861 states and 2120 transitions. [2022-03-03 19:46:09,578 INFO L78 Accepts]: Start accepts. Automaton has 861 states and 2120 transitions. Word has length 26 [2022-03-03 19:46:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:09,578 INFO L470 AbstractCegarLoop]: Abstraction has 861 states and 2120 transitions. [2022-03-03 19:46:09,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 861 states and 2120 transitions. [2022-03-03 19:46:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:09,579 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:09,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:09,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:09,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-03 19:46:09,795 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:09,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:09,795 INFO L85 PathProgramCache]: Analyzing trace with hash 234980, now seen corresponding path program 36 times [2022-03-03 19:46:09,795 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:09,795 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668583538] [2022-03-03 19:46:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:10,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:10,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:10,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668583538] [2022-03-03 19:46:10,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668583538] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:10,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026435985] [2022-03-03 19:46:10,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:10,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:10,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:10,034 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:10,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-03 19:46:10,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:46:10,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:10,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:10,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:10,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:10,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:10,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:10,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:10,553 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:10,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:10,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:10,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:10,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:10,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:10,698 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:10,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026435985] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:10,698 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:10,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:10,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928592103] [2022-03-03 19:46:10,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:10,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:10,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:10,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:10,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:10,699 INFO L87 Difference]: Start difference. First operand 861 states and 2120 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:11,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:11,364 INFO L93 Difference]: Finished difference Result 1190 states and 2852 transitions. [2022-03-03 19:46:11,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:46:11,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:11,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:11,367 INFO L225 Difference]: With dead ends: 1190 [2022-03-03 19:46:11,367 INFO L226 Difference]: Without dead ends: 1183 [2022-03-03 19:46:11,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=303, Invalid=2049, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:46:11,367 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 110 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:11,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 127 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 409 Invalid, 0 Unknown, 206 Unchecked, 0.1s Time] [2022-03-03 19:46:11,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1183 states. [2022-03-03 19:46:11,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1183 to 868. [2022-03-03 19:46:11,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 2.4694348327566322) internal successors, (2141), 867 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:11,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2141 transitions. [2022-03-03 19:46:11,384 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2141 transitions. Word has length 26 [2022-03-03 19:46:11,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:11,385 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 2141 transitions. [2022-03-03 19:46:11,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:11,385 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2141 transitions. [2022-03-03 19:46:11,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:11,386 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:11,386 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:11,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:11,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:11,602 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:11,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1008532964, now seen corresponding path program 37 times [2022-03-03 19:46:11,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:11,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888555026] [2022-03-03 19:46:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:11,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:11,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888555026] [2022-03-03 19:46:11,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888555026] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:11,824 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096743361] [2022-03-03 19:46:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:11,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:11,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:11,826 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:11,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-03 19:46:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:11,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:12,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:12,267 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:12,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:12,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:12,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:12,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096743361] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:12,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:12,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:12,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048552507] [2022-03-03 19:46:12,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:12,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:12,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:12,394 INFO L87 Difference]: Start difference. First operand 868 states and 2141 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:13,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:13,132 INFO L93 Difference]: Finished difference Result 1265 states and 3033 transitions. [2022-03-03 19:46:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-03 19:46:13,132 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:13,134 INFO L225 Difference]: With dead ends: 1265 [2022-03-03 19:46:13,135 INFO L226 Difference]: Without dead ends: 1258 [2022-03-03 19:46:13,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=2037, Unknown=0, NotChecked=0, Total=2352 [2022-03-03 19:46:13,135 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:13,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 140 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 462 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-03-03 19:46:13,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2022-03-03 19:46:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 900. [2022-03-03 19:46:13,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.474972191323693) internal successors, (2225), 899 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:13,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2225 transitions. [2022-03-03 19:46:13,167 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2225 transitions. Word has length 26 [2022-03-03 19:46:13,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:13,167 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2225 transitions. [2022-03-03 19:46:13,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:13,167 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2225 transitions. [2022-03-03 19:46:13,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:13,169 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:13,169 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:13,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:13,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-03 19:46:13,384 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:13,384 INFO L85 PathProgramCache]: Analyzing trace with hash -9411100, now seen corresponding path program 38 times [2022-03-03 19:46:13,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:13,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024740700] [2022-03-03 19:46:13,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:13,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:13,631 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:13,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024740700] [2022-03-03 19:46:13,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024740700] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:13,631 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035662239] [2022-03-03 19:46:13,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:13,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:13,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:13,632 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:13,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-03 19:46:13,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:13,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:13,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:13,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:13,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:13,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:13,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:13,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:13,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:13,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:13,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:14,049 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:14,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:14,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:14,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035662239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:14,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:14,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:14,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193841269] [2022-03-03 19:46:14,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:14,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:14,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:14,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:14,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:14,222 INFO L87 Difference]: Start difference. First operand 900 states and 2225 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:15,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:15,071 INFO L93 Difference]: Finished difference Result 1181 states and 2881 transitions. [2022-03-03 19:46:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:46:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:15,076 INFO L225 Difference]: With dead ends: 1181 [2022-03-03 19:46:15,076 INFO L226 Difference]: Without dead ends: 1174 [2022-03-03 19:46:15,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:46:15,077 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 90 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:15,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 118 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 449 Invalid, 0 Unknown, 221 Unchecked, 0.2s Time] [2022-03-03 19:46:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-03 19:46:15,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 911. [2022-03-03 19:46:15,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 911 states, 910 states have (on average 2.4835164835164836) internal successors, (2260), 910 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 911 states to 911 states and 2260 transitions. [2022-03-03 19:46:15,095 INFO L78 Accepts]: Start accepts. Automaton has 911 states and 2260 transitions. Word has length 26 [2022-03-03 19:46:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:15,096 INFO L470 AbstractCegarLoop]: Abstraction has 911 states and 2260 transitions. [2022-03-03 19:46:15,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 911 states and 2260 transitions. [2022-03-03 19:46:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:15,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:15,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:15,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-03-03 19:46:15,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-03 19:46:15,300 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:15,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2100038610, now seen corresponding path program 39 times [2022-03-03 19:46:15,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:15,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324718514] [2022-03-03 19:46:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:15,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:15,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:15,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324718514] [2022-03-03 19:46:15,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324718514] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:15,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242101454] [2022-03-03 19:46:15,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:15,542 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:15,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-03 19:46:15,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:46:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:15,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-03 19:46:15,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:16,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:16,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:16,074 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:16,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2022-03-03 19:46:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:16,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:16,958 INFO L353 Elim1Store]: treesize reduction 24, result has 83.0 percent of original size [2022-03-03 19:46:16,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 138 [2022-03-03 19:46:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:24,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242101454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:24,060 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:24,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 33 [2022-03-03 19:46:24,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664011975] [2022-03-03 19:46:24,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:24,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-03 19:46:24,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-03 19:46:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-03-03 19:46:24,061 INFO L87 Difference]: Start difference. First operand 911 states and 2260 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:25,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:25,409 INFO L93 Difference]: Finished difference Result 1339 states and 3202 transitions. [2022-03-03 19:46:25,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:46:25,409 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:25,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:25,411 INFO L225 Difference]: With dead ends: 1339 [2022-03-03 19:46:25,411 INFO L226 Difference]: Without dead ends: 1284 [2022-03-03 19:46:25,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=421, Invalid=3119, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:46:25,412 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 121 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 927 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:25,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 212 Invalid, 1284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 322 Invalid, 0 Unknown, 927 Unchecked, 0.1s Time] [2022-03-03 19:46:25,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-03-03 19:46:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 923. [2022-03-03 19:46:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 2.477223427331887) internal successors, (2284), 922 states have internal predecessors, (2284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 2284 transitions. [2022-03-03 19:46:25,424 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 2284 transitions. Word has length 26 [2022-03-03 19:46:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:25,424 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 2284 transitions. [2022-03-03 19:46:25,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 2284 transitions. [2022-03-03 19:46:25,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:25,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:25,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:25,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-03 19:46:25,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-03-03 19:46:25,640 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:25,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:25,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1232654318, now seen corresponding path program 40 times [2022-03-03 19:46:25,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:25,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698758677] [2022-03-03 19:46:25,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:25,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:25,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:25,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698758677] [2022-03-03 19:46:25,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698758677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:25,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018466304] [2022-03-03 19:46:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:25,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:25,900 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:25,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-03 19:46:25,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:25,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:25,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:25,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:26,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:26,461 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:26,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:26,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:26,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:26,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:26,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:26,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018466304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:26,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:26,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:26,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842561155] [2022-03-03 19:46:26,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:26,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:26,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:26,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:26,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:26,631 INFO L87 Difference]: Start difference. First operand 923 states and 2284 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:28,114 INFO L93 Difference]: Finished difference Result 1394 states and 3319 transitions. [2022-03-03 19:46:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:46:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:28,116 INFO L225 Difference]: With dead ends: 1394 [2022-03-03 19:46:28,116 INFO L226 Difference]: Without dead ends: 1309 [2022-03-03 19:46:28,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 36 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=518, Invalid=3022, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:46:28,118 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 154 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:28,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 228 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 717 Invalid, 0 Unknown, 247 Unchecked, 0.3s Time] [2022-03-03 19:46:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-03-03 19:46:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 975. [2022-03-03 19:46:28,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.452772073921971) internal successors, (2389), 974 states have internal predecessors, (2389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2389 transitions. [2022-03-03 19:46:28,135 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2389 transitions. Word has length 26 [2022-03-03 19:46:28,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:28,136 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 2389 transitions. [2022-03-03 19:46:28,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:28,136 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2389 transitions. [2022-03-03 19:46:28,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:28,137 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:28,137 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:28,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:28,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:28,353 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:28,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:28,353 INFO L85 PathProgramCache]: Analyzing trace with hash 715108594, now seen corresponding path program 41 times [2022-03-03 19:46:28,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:28,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712356767] [2022-03-03 19:46:28,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:28,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712356767] [2022-03-03 19:46:28,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712356767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:28,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187848518] [2022-03-03 19:46:28,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:28,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:28,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:28,607 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:28,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-03 19:46:28,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:46:28,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:28,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:28,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:28,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:28,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:28,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:28,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:28,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:28,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:29,115 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:29,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:29,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:29,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187848518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:29,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:29,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:29,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359650668] [2022-03-03 19:46:29,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:29,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:29,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:29,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:29,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:29,291 INFO L87 Difference]: Start difference. First operand 975 states and 2389 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:30,752 INFO L93 Difference]: Finished difference Result 1393 states and 3309 transitions. [2022-03-03 19:46:30,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:46:30,752 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:30,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:30,754 INFO L225 Difference]: With dead ends: 1393 [2022-03-03 19:46:30,755 INFO L226 Difference]: Without dead ends: 1379 [2022-03-03 19:46:30,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=530, Invalid=3252, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:46:30,755 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:30,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 98 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 460 Invalid, 0 Unknown, 137 Unchecked, 0.3s Time] [2022-03-03 19:46:30,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2022-03-03 19:46:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 970. [2022-03-03 19:46:30,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 970 states, 969 states have (on average 2.454076367389061) internal successors, (2378), 969 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 970 states to 970 states and 2378 transitions. [2022-03-03 19:46:30,768 INFO L78 Accepts]: Start accepts. Automaton has 970 states and 2378 transitions. Word has length 26 [2022-03-03 19:46:30,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:30,769 INFO L470 AbstractCegarLoop]: Abstraction has 970 states and 2378 transitions. [2022-03-03 19:46:30,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:30,769 INFO L276 IsEmpty]: Start isEmpty. Operand 970 states and 2378 transitions. [2022-03-03 19:46:30,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:30,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:30,770 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:30,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:30,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:30,975 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:30,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:30,975 INFO L85 PathProgramCache]: Analyzing trace with hash -597566298, now seen corresponding path program 42 times [2022-03-03 19:46:30,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:30,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312272052] [2022-03-03 19:46:30,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:30,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:31,215 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:31,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:31,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312272052] [2022-03-03 19:46:31,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312272052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:31,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237883060] [2022-03-03 19:46:31,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:31,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:31,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:31,218 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:31,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:46:31,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:31,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:31,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-03 19:46:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:31,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:31,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:31,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:31,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:31,635 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:31,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:31,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:31,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:31,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:31,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237883060] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:31,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:31,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:31,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014521884] [2022-03-03 19:46:31,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:31,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:31,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:31,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:31,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:31,835 INFO L87 Difference]: Start difference. First operand 970 states and 2378 transitions. Second operand has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:33,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:33,695 INFO L93 Difference]: Finished difference Result 1579 states and 3725 transitions. [2022-03-03 19:46:33,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:46:33,695 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:33,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:33,697 INFO L225 Difference]: With dead ends: 1579 [2022-03-03 19:46:33,697 INFO L226 Difference]: Without dead ends: 1556 [2022-03-03 19:46:33,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=541, Invalid=3619, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:46:33,698 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 171 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1143 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:33,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 179 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1143 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:46:33,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2022-03-03 19:46:33,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1009. [2022-03-03 19:46:33,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.4603174603174605) internal successors, (2480), 1008 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:33,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2480 transitions. [2022-03-03 19:46:33,725 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2480 transitions. Word has length 26 [2022-03-03 19:46:33,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:33,725 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2480 transitions. [2022-03-03 19:46:33,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:33,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2480 transitions. [2022-03-03 19:46:33,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:33,733 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:33,733 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:33,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:33,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-03 19:46:33,948 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:33,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:33,949 INFO L85 PathProgramCache]: Analyzing trace with hash 707454872, now seen corresponding path program 43 times [2022-03-03 19:46:33,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:33,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75547850] [2022-03-03 19:46:33,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:33,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:34,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:34,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75547850] [2022-03-03 19:46:34,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75547850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:34,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474834349] [2022-03-03 19:46:34,203 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:34,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:34,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:34,204 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:34,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-03 19:46:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:34,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:34,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:34,567 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:34,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:34,818 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:34,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:34,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:34,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:35,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474834349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:35,006 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:35,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:35,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994803853] [2022-03-03 19:46:35,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:35,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:35,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:35,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:35,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:35,007 INFO L87 Difference]: Start difference. First operand 1009 states and 2480 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:36,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:36,181 INFO L93 Difference]: Finished difference Result 1387 states and 3307 transitions. [2022-03-03 19:46:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:46:36,181 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:36,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:36,196 INFO L225 Difference]: With dead ends: 1387 [2022-03-03 19:46:36,196 INFO L226 Difference]: Without dead ends: 1342 [2022-03-03 19:46:36,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=451, Invalid=2519, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:46:36,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 134 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 159 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:36,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 140 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 663 Invalid, 0 Unknown, 159 Unchecked, 0.3s Time] [2022-03-03 19:46:36,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2022-03-03 19:46:36,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 993. [2022-03-03 19:46:36,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 2.467741935483871) internal successors, (2448), 992 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2448 transitions. [2022-03-03 19:46:36,222 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2448 transitions. Word has length 26 [2022-03-03 19:46:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2448 transitions. [2022-03-03 19:46:36,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2448 transitions. [2022-03-03 19:46:36,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:36,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:36,223 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:36,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:36,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-03 19:46:36,439 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:36,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:36,439 INFO L85 PathProgramCache]: Analyzing trace with hash 277025134, now seen corresponding path program 44 times [2022-03-03 19:46:36,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:36,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740897022] [2022-03-03 19:46:36,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:36,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:36,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:36,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740897022] [2022-03-03 19:46:36,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740897022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:36,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313318970] [2022-03-03 19:46:36,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:36,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:36,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:36,657 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:36,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:36,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:36,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:36,678 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-03 19:46:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:36,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:36,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:36,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:36,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:36,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:36,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:36,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:37,231 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:37,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:37,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:37,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:37,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-03 19:46:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:37,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313318970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:37,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:37,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-03 19:46:37,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751433432] [2022-03-03 19:46:37,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:37,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:46:37,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:37,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:46:37,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:46:37,407 INFO L87 Difference]: Start difference. First operand 993 states and 2448 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:38,333 INFO L93 Difference]: Finished difference Result 1343 states and 3128 transitions. [2022-03-03 19:46:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-03 19:46:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:38,335 INFO L225 Difference]: With dead ends: 1343 [2022-03-03 19:46:38,335 INFO L226 Difference]: Without dead ends: 1285 [2022-03-03 19:46:38,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 36 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:46:38,336 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 230 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:38,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 212 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 899 Invalid, 0 Unknown, 11 Unchecked, 0.4s Time] [2022-03-03 19:46:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-03 19:46:38,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1081. [2022-03-03 19:46:38,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 1080 states have (on average 2.4805555555555556) internal successors, (2679), 1080 states have internal predecessors, (2679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:38,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 2679 transitions. [2022-03-03 19:46:38,354 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 2679 transitions. Word has length 26 [2022-03-03 19:46:38,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:38,355 INFO L470 AbstractCegarLoop]: Abstraction has 1081 states and 2679 transitions. [2022-03-03 19:46:38,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:38,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 2679 transitions. [2022-03-03 19:46:38,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:38,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:38,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:38,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:38,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-03 19:46:38,571 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:38,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1792998102, now seen corresponding path program 45 times [2022-03-03 19:46:38,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:38,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83004764] [2022-03-03 19:46:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:38,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:38,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:38,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83004764] [2022-03-03 19:46:38,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83004764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:38,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773138122] [2022-03-03 19:46:38,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:46:38,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:38,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:38,815 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:38,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-03 19:46:38,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:46:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:38,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:46:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:39,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:39,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:39,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:39,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:39,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:39,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:39,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:39,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-03 19:46:39,397 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:39,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:39,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:39,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:39,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:46:39,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-03 19:46:41,744 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:41,745 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773138122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:41,745 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:41,745 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-03 19:46:41,745 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831443426] [2022-03-03 19:46:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:41,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:46:41,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:41,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:46:41,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:46:41,746 INFO L87 Difference]: Start difference. First operand 1081 states and 2679 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:47,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:47,549 INFO L93 Difference]: Finished difference Result 2055 states and 4788 transitions. [2022-03-03 19:46:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:46:47,549 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:47,553 INFO L225 Difference]: With dead ends: 2055 [2022-03-03 19:46:47,553 INFO L226 Difference]: Without dead ends: 1985 [2022-03-03 19:46:47,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 24 SyntacticMatches, 14 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5247 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=2012, Invalid=12508, Unknown=0, NotChecked=0, Total=14520 [2022-03-03 19:46:47,554 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 388 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:47,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 395 Invalid, 2064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1690 Invalid, 0 Unknown, 270 Unchecked, 0.8s Time] [2022-03-03 19:46:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-03 19:46:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1177. [2022-03-03 19:46:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.5008503401360542) internal successors, (2941), 1176 states have internal predecessors, (2941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 2941 transitions. [2022-03-03 19:46:47,593 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 2941 transitions. Word has length 26 [2022-03-03 19:46:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:47,594 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 2941 transitions. [2022-03-03 19:46:47,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 2941 transitions. [2022-03-03 19:46:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:47,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:47,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:47,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:47,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:47,812 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:47,812 INFO L85 PathProgramCache]: Analyzing trace with hash 771199462, now seen corresponding path program 46 times [2022-03-03 19:46:47,812 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:47,812 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852190063] [2022-03-03 19:46:47,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:47,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:47,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:48,034 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,034 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:48,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852190063] [2022-03-03 19:46:48,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852190063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:48,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120267623] [2022-03-03 19:46:48,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:46:48,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:48,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:48,036 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:48,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-03 19:46:48,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:46:48,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:48,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:48,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:48,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:48,573 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:48,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:48,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:48,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:48,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:48,760 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:48,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120267623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:48,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:48,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-03 19:46:48,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266681400] [2022-03-03 19:46:48,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:48,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:46:48,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:48,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:46:48,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:46:48,761 INFO L87 Difference]: Start difference. First operand 1177 states and 2941 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:50,547 INFO L93 Difference]: Finished difference Result 1541 states and 3710 transitions. [2022-03-03 19:46:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:46:50,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:50,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:50,550 INFO L225 Difference]: With dead ends: 1541 [2022-03-03 19:46:50,550 INFO L226 Difference]: Without dead ends: 1473 [2022-03-03 19:46:50,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=540, Invalid=3620, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:46:50,550 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:50,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 181 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-03 19:46:50,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-03-03 19:46:50,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1230. [2022-03-03 19:46:50,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.48006509357201) internal successors, (3048), 1229 states have internal predecessors, (3048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3048 transitions. [2022-03-03 19:46:50,566 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3048 transitions. Word has length 26 [2022-03-03 19:46:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:50,566 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 3048 transitions. [2022-03-03 19:46:50,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3048 transitions. [2022-03-03 19:46:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:50,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:50,568 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:50,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:50,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:50,784 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1127291350, now seen corresponding path program 47 times [2022-03-03 19:46:50,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:50,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613182736] [2022-03-03 19:46:50,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:50,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:51,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613182736] [2022-03-03 19:46:51,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613182736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:51,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311456978] [2022-03-03 19:46:51,019 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:46:51,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:51,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:51,020 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:51,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:46:51,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-03 19:46:51,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:51,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:51,343 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:51,573 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:51,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:51,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:51,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:51,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311456978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:51,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:51,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-03 19:46:51,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870504448] [2022-03-03 19:46:51,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:51,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:46:51,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:46:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:46:51,832 INFO L87 Difference]: Start difference. First operand 1230 states and 3048 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:53,797 INFO L93 Difference]: Finished difference Result 1414 states and 3424 transitions. [2022-03-03 19:46:53,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-03 19:46:53,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:53,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:53,800 INFO L225 Difference]: With dead ends: 1414 [2022-03-03 19:46:53,800 INFO L226 Difference]: Without dead ends: 1388 [2022-03-03 19:46:53,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=475, Invalid=3431, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:46:53,801 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 150 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:53,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 226 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:46:53,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2022-03-03 19:46:53,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1244. [2022-03-03 19:46:53,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1244 states, 1243 states have (on average 2.474658085277554) internal successors, (3076), 1243 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1244 states to 1244 states and 3076 transitions. [2022-03-03 19:46:53,815 INFO L78 Accepts]: Start accepts. Automaton has 1244 states and 3076 transitions. Word has length 26 [2022-03-03 19:46:53,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:53,815 INFO L470 AbstractCegarLoop]: Abstraction has 1244 states and 3076 transitions. [2022-03-03 19:46:53,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:53,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1244 states and 3076 transitions. [2022-03-03 19:46:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:53,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:53,816 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:53,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:54,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:54,047 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:54,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:54,047 INFO L85 PathProgramCache]: Analyzing trace with hash -509922762, now seen corresponding path program 48 times [2022-03-03 19:46:54,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:54,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283415732] [2022-03-03 19:46:54,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:54,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:54,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:54,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283415732] [2022-03-03 19:46:54,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283415732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:54,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747862555] [2022-03-03 19:46:54,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:46:54,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:54,339 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:54,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-03 19:46:54,372 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-03 19:46:54,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:54,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:54,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:54,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:54,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:54,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:54,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:54,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:54,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:54,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:55,099 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:55,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:55,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:55,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:46:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:55,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747862555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:55,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:55,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 25 [2022-03-03 19:46:55,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753442663] [2022-03-03 19:46:55,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:55,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:46:55,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:55,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:46:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:46:55,403 INFO L87 Difference]: Start difference. First operand 1244 states and 3076 transitions. Second operand has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:56,727 INFO L93 Difference]: Finished difference Result 1765 states and 4214 transitions. [2022-03-03 19:46:56,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:46:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:56,749 INFO L225 Difference]: With dead ends: 1765 [2022-03-03 19:46:56,749 INFO L226 Difference]: Without dead ends: 1740 [2022-03-03 19:46:56,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2022-03-03 19:46:56,749 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 165 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:56,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 249 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 981 Invalid, 0 Unknown, 178 Unchecked, 0.5s Time] [2022-03-03 19:46:56,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-03-03 19:46:56,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1287. [2022-03-03 19:46:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1287 states, 1286 states have (on average 2.4805598755832037) internal successors, (3190), 1286 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1287 states to 1287 states and 3190 transitions. [2022-03-03 19:46:56,765 INFO L78 Accepts]: Start accepts. Automaton has 1287 states and 3190 transitions. Word has length 26 [2022-03-03 19:46:56,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:56,765 INFO L470 AbstractCegarLoop]: Abstraction has 1287 states and 3190 transitions. [2022-03-03 19:46:56,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3846153846153846) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1287 states and 3190 transitions. [2022-03-03 19:46:56,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:56,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:56,767 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:56,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:56,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-03 19:46:56,981 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1776670478, now seen corresponding path program 49 times [2022-03-03 19:46:56,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:56,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539296845] [2022-03-03 19:46:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:56,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,188 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:57,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539296845] [2022-03-03 19:46:57,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539296845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:57,188 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45570063] [2022-03-03 19:46:57,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:46:57,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:57,189 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:57,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-03 19:46:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:57,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:57,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:57,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:57,712 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:57,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:57,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-03 19:46:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:57,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45570063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:46:57,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:46:57,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-03 19:46:57,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223712936] [2022-03-03 19:46:57,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:46:57,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:46:57,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:46:57,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:46:57,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:46:57,881 INFO L87 Difference]: Start difference. First operand 1287 states and 3190 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:58,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:46:58,895 INFO L93 Difference]: Finished difference Result 1693 states and 3972 transitions. [2022-03-03 19:46:58,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:46:58,896 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:46:58,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:46:58,898 INFO L225 Difference]: With dead ends: 1693 [2022-03-03 19:46:58,898 INFO L226 Difference]: Without dead ends: 1659 [2022-03-03 19:46:58,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=2197, Unknown=0, NotChecked=0, Total=2550 [2022-03-03 19:46:58,899 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 216 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:46:58,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 263 Invalid, 1028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 973 Invalid, 0 Unknown, 16 Unchecked, 0.4s Time] [2022-03-03 19:46:58,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2022-03-03 19:46:58,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1368. [2022-03-03 19:46:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1367 states have (on average 2.5003657644476958) internal successors, (3418), 1367 states have internal predecessors, (3418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:58,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 3418 transitions. [2022-03-03 19:46:58,916 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 3418 transitions. Word has length 26 [2022-03-03 19:46:58,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:46:58,916 INFO L470 AbstractCegarLoop]: Abstraction has 1368 states and 3418 transitions. [2022-03-03 19:46:58,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:46:58,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 3418 transitions. [2022-03-03 19:46:58,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:46:58,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:46:58,918 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:46:58,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-03 19:46:59,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-03 19:46:59,134 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:46:59,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:46:59,134 INFO L85 PathProgramCache]: Analyzing trace with hash -719982534, now seen corresponding path program 50 times [2022-03-03 19:46:59,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:46:59,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450198858] [2022-03-03 19:46:59,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:46:59,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:46:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:46:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:59,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:46:59,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450198858] [2022-03-03 19:46:59,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450198858] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:46:59,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862357381] [2022-03-03 19:46:59,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:46:59,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:46:59,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:46:59,355 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:46:59,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-03 19:46:59,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:46:59,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:46:59,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:46:59,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:46:59,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,686 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:46:59,705 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:46:59,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:46:59,867 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:46:59,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:46:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:46:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:46:59,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 3 [2022-03-03 19:47:00,015 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:00,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862357381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:00,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:00,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 23 [2022-03-03 19:47:00,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182543223] [2022-03-03 19:47:00,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:00,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-03 19:47:00,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:00,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-03 19:47:00,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-03 19:47:00,016 INFO L87 Difference]: Start difference. First operand 1368 states and 3418 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:00,842 INFO L93 Difference]: Finished difference Result 1665 states and 3913 transitions. [2022-03-03 19:47:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-03 19:47:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:47:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:00,845 INFO L225 Difference]: With dead ends: 1665 [2022-03-03 19:47:00,845 INFO L226 Difference]: Without dead ends: 1662 [2022-03-03 19:47:00,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=313, Invalid=1943, Unknown=0, NotChecked=0, Total=2256 [2022-03-03 19:47:00,846 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 195 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:00,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 234 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 940 Invalid, 0 Unknown, 80 Unchecked, 0.3s Time] [2022-03-03 19:47:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2022-03-03 19:47:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1364. [2022-03-03 19:47:00,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1364 states, 1363 states have (on average 2.5018341892883345) internal successors, (3410), 1363 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:00,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1364 states to 1364 states and 3410 transitions. [2022-03-03 19:47:00,863 INFO L78 Accepts]: Start accepts. Automaton has 1364 states and 3410 transitions. Word has length 26 [2022-03-03 19:47:00,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:00,863 INFO L470 AbstractCegarLoop]: Abstraction has 1364 states and 3410 transitions. [2022-03-03 19:47:00,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 1364 states and 3410 transitions. [2022-03-03 19:47:00,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:47:00,865 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:00,865 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:00,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:01,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,069 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:01,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:01,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1113980334, now seen corresponding path program 51 times [2022-03-03 19:47:01,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:01,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425588477] [2022-03-03 19:47:01,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:01,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:01,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:01,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425588477] [2022-03-03 19:47:01,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425588477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:01,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494111363] [2022-03-03 19:47:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:01,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:01,314 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:01,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-03 19:47:01,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-03 19:47:01,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:01,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-03 19:47:01,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:01,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:01,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:01,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:01,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 61 treesize of output 85 [2022-03-03 19:47:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:02,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:02,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:02,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:02,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:02,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:02,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 58 treesize of output 131 [2022-03-03 19:47:04,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:04,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494111363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:04,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:04,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 34 [2022-03-03 19:47:04,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841580976] [2022-03-03 19:47:04,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:04,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-03 19:47:04,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:04,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-03 19:47:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2022-03-03 19:47:04,740 INFO L87 Difference]: Start difference. First operand 1364 states and 3410 transitions. Second operand has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:09,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:09,332 INFO L93 Difference]: Finished difference Result 2389 states and 5627 transitions. [2022-03-03 19:47:09,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-03 19:47:09,332 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:47:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:09,335 INFO L225 Difference]: With dead ends: 2389 [2022-03-03 19:47:09,335 INFO L226 Difference]: Without dead ends: 2321 [2022-03-03 19:47:09,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 24 SyntacticMatches, 9 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1586, Invalid=8314, Unknown=0, NotChecked=0, Total=9900 [2022-03-03 19:47:09,341 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 409 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 1293 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 409 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:09,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [409 Valid, 366 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1293 Invalid, 0 Unknown, 92 Unchecked, 0.7s Time] [2022-03-03 19:47:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2321 states. [2022-03-03 19:47:09,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2321 to 1406. [2022-03-03 19:47:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1406 states, 1405 states have (on average 2.498932384341637) internal successors, (3511), 1405 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:09,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1406 states to 1406 states and 3511 transitions. [2022-03-03 19:47:09,369 INFO L78 Accepts]: Start accepts. Automaton has 1406 states and 3511 transitions. Word has length 26 [2022-03-03 19:47:09,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:09,370 INFO L470 AbstractCegarLoop]: Abstraction has 1406 states and 3511 transitions. [2022-03-03 19:47:09,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1406 states and 3511 transitions. [2022-03-03 19:47:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:47:09,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:09,371 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:09,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:09,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-03 19:47:09,588 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -3388566, now seen corresponding path program 52 times [2022-03-03 19:47:09,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:09,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593345822] [2022-03-03 19:47:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:09,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:09,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:09,822 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:09,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593345822] [2022-03-03 19:47:09,823 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593345822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:09,823 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66908993] [2022-03-03 19:47:09,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:09,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:09,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:09,832 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:09,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:09,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:09,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:47:09,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:09,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-03 19:47:10,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:47:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:10,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:10,297 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:47:10,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:47:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:10,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:47:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:10,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66908993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:10,483 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:10,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-03 19:47:10,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798801932] [2022-03-03 19:47:10,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:10,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:10,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:10,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:10,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:10,484 INFO L87 Difference]: Start difference. First operand 1406 states and 3511 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:11,846 INFO L93 Difference]: Finished difference Result 1692 states and 4095 transitions. [2022-03-03 19:47:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:47:11,847 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:47:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:11,849 INFO L225 Difference]: With dead ends: 1692 [2022-03-03 19:47:11,849 INFO L226 Difference]: Without dead ends: 1608 [2022-03-03 19:47:11,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=485, Invalid=2821, Unknown=0, NotChecked=0, Total=3306 [2022-03-03 19:47:11,850 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:11,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 181 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:47:11,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-03-03 19:47:11,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1433. [2022-03-03 19:47:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1433 states, 1432 states have (on average 2.4797486033519553) internal successors, (3551), 1432 states have internal predecessors, (3551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1433 states to 1433 states and 3551 transitions. [2022-03-03 19:47:11,868 INFO L78 Accepts]: Start accepts. Automaton has 1433 states and 3551 transitions. Word has length 26 [2022-03-03 19:47:11,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:11,868 INFO L470 AbstractCegarLoop]: Abstraction has 1433 states and 3551 transitions. [2022-03-03 19:47:11,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:11,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1433 states and 3551 transitions. [2022-03-03 19:47:11,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-03 19:47:11,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:11,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:12,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-03 19:47:12,084 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:12,084 INFO L85 PathProgramCache]: Analyzing trace with hash 908041902, now seen corresponding path program 53 times [2022-03-03 19:47:12,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:12,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381775331] [2022-03-03 19:47:12,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:12,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:12,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:12,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381775331] [2022-03-03 19:47:12,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381775331] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:12,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380494650] [2022-03-03 19:47:12,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:12,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:12,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:12,308 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:12,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-03 19:47:12,330 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-03 19:47:12,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:12,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-03 19:47:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:12,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2022-03-03 19:47:12,557 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:12,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:12,712 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-03 19:47:12,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 30 treesize of output 95 [2022-03-03 19:47:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:12,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 5 [2022-03-03 19:47:12,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:12,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380494650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:12,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:12,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 24 [2022-03-03 19:47:12,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281627013] [2022-03-03 19:47:12,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:12,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:12,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:12,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:12,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:12,884 INFO L87 Difference]: Start difference. First operand 1433 states and 3551 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:13,963 INFO L93 Difference]: Finished difference Result 1636 states and 3970 transitions. [2022-03-03 19:47:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:47:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have 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 [2022-03-03 19:47:13,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:13,969 INFO L225 Difference]: With dead ends: 1636 [2022-03-03 19:47:13,969 INFO L226 Difference]: Without dead ends: 1626 [2022-03-03 19:47:13,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=394, Invalid=2686, Unknown=0, NotChecked=0, Total=3080 [2022-03-03 19:47:13,973 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 159 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:13,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 186 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:13,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1626 states. [2022-03-03 19:47:13,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1626 to 1442. [2022-03-03 19:47:13,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 2.479528105482304) internal successors, (3573), 1441 states have internal predecessors, (3573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:13,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 3573 transitions. [2022-03-03 19:47:13,994 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 3573 transitions. Word has length 26 [2022-03-03 19:47:13,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:13,994 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 3573 transitions. [2022-03-03 19:47:13,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:13,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 3573 transitions. [2022-03-03 19:47:13,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:13,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:13,996 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:14,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:14,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:14,212 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:14,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1403227622, now seen corresponding path program 54 times [2022-03-03 19:47:14,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:14,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852944924] [2022-03-03 19:47:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:14,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:14,291 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:14,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852944924] [2022-03-03 19:47:14,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852944924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:14,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548791656] [2022-03-03 19:47:14,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:14,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:14,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:14,292 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:14,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-03 19:47:14,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:47:14,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:14,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:14,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:14,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:14,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548791656] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:14,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:14,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-03-03 19:47:14,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456222715] [2022-03-03 19:47:14,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:14,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:47:14,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:14,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:47:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:47:14,524 INFO L87 Difference]: Start difference. First operand 1442 states and 3573 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:15,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:15,166 INFO L93 Difference]: Finished difference Result 2062 states and 4783 transitions. [2022-03-03 19:47:15,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-03 19:47:15,166 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:15,169 INFO L225 Difference]: With dead ends: 2062 [2022-03-03 19:47:15,169 INFO L226 Difference]: Without dead ends: 2062 [2022-03-03 19:47:15,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1238, Invalid=3592, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:47:15,170 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 218 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:15,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 168 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:15,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2062 states. [2022-03-03 19:47:15,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2062 to 1289. [2022-03-03 19:47:15,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1289 states, 1288 states have (on average 2.482919254658385) internal successors, (3198), 1288 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:15,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1289 states to 1289 states and 3198 transitions. [2022-03-03 19:47:15,189 INFO L78 Accepts]: Start accepts. Automaton has 1289 states and 3198 transitions. Word has length 28 [2022-03-03 19:47:15,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:15,189 INFO L470 AbstractCegarLoop]: Abstraction has 1289 states and 3198 transitions. [2022-03-03 19:47:15,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 25 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:15,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1289 states and 3198 transitions. [2022-03-03 19:47:15,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:15,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:15,190 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:15,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:15,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:15,395 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:15,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:15,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1901754846, now seen corresponding path program 55 times [2022-03-03 19:47:15,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:15,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236886896] [2022-03-03 19:47:15,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:15,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:15,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:15,488 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:15,488 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:15,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236886896] [2022-03-03 19:47:15,488 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236886896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:15,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833687897] [2022-03-03 19:47:15,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:15,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:15,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:15,490 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:15,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-03 19:47:15,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:15,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:15,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:15,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:15,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:15,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833687897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:15,796 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:15,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:47:15,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393672270] [2022-03-03 19:47:15,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:15,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:15,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:15,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:15,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:15,797 INFO L87 Difference]: Start difference. First operand 1289 states and 3198 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:16,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:16,473 INFO L93 Difference]: Finished difference Result 2310 states and 5344 transitions. [2022-03-03 19:47:16,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:47:16,473 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:16,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:16,476 INFO L225 Difference]: With dead ends: 2310 [2022-03-03 19:47:16,476 INFO L226 Difference]: Without dead ends: 2239 [2022-03-03 19:47:16,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1147, Invalid=3275, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:47:16,477 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 416 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:16,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 177 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:16,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2022-03-03 19:47:16,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 1468. [2022-03-03 19:47:16,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1468 states, 1467 states have (on average 2.496932515337423) internal successors, (3663), 1467 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:16,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1468 states to 1468 states and 3663 transitions. [2022-03-03 19:47:16,499 INFO L78 Accepts]: Start accepts. Automaton has 1468 states and 3663 transitions. Word has length 28 [2022-03-03 19:47:16,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:16,500 INFO L470 AbstractCegarLoop]: Abstraction has 1468 states and 3663 transitions. [2022-03-03 19:47:16,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:16,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1468 states and 3663 transitions. [2022-03-03 19:47:16,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:16,501 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:16,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:16,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:16,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-03 19:47:16,718 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2007391006, now seen corresponding path program 56 times [2022-03-03 19:47:16,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:16,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086203581] [2022-03-03 19:47:16,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:16,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:16,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:16,833 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:16,833 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:16,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086203581] [2022-03-03 19:47:16,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086203581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:16,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706414644] [2022-03-03 19:47:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:16,834 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:16,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-03 19:47:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:16,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:17,042 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:17,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:17,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706414644] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:17,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:17,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 25 [2022-03-03 19:47:17,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692960360] [2022-03-03 19:47:17,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:17,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:47:17,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:17,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:47:17,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:47:17,214 INFO L87 Difference]: Start difference. First operand 1468 states and 3663 transitions. Second operand has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:18,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:18,204 INFO L93 Difference]: Finished difference Result 2686 states and 6345 transitions. [2022-03-03 19:47:18,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-03 19:47:18,205 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:18,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:18,208 INFO L225 Difference]: With dead ends: 2686 [2022-03-03 19:47:18,208 INFO L226 Difference]: Without dead ends: 2682 [2022-03-03 19:47:18,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2421 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1964, Invalid=5008, Unknown=0, NotChecked=0, Total=6972 [2022-03-03 19:47:18,208 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 371 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:18,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 231 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:18,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2022-03-03 19:47:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 1786. [2022-03-03 19:47:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1785 states have (on average 2.5126050420168067) internal successors, (4485), 1785 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:18,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 4485 transitions. [2022-03-03 19:47:18,233 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 4485 transitions. Word has length 28 [2022-03-03 19:47:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:18,233 INFO L470 AbstractCegarLoop]: Abstraction has 1786 states and 4485 transitions. [2022-03-03 19:47:18,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:18,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 4485 transitions. [2022-03-03 19:47:18,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:18,235 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:18,235 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:18,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:18,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:18,451 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:18,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:18,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1955897502, now seen corresponding path program 57 times [2022-03-03 19:47:18,451 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:18,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324002998] [2022-03-03 19:47:18,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:18,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:18,514 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324002998] [2022-03-03 19:47:18,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324002998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:18,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741740070] [2022-03-03 19:47:18,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:18,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:18,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:18,528 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:18,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-03 19:47:18,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:47:18,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:18,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:18,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741740070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:18,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:18,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-03 19:47:18,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939111357] [2022-03-03 19:47:18,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:18,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:18,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:18,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:18,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:18,818 INFO L87 Difference]: Start difference. First operand 1786 states and 4485 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:19,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:19,269 INFO L93 Difference]: Finished difference Result 2073 states and 5023 transitions. [2022-03-03 19:47:19,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-03 19:47:19,269 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:19,271 INFO L225 Difference]: With dead ends: 2073 [2022-03-03 19:47:19,271 INFO L226 Difference]: Without dead ends: 2069 [2022-03-03 19:47:19,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=981, Invalid=2441, Unknown=0, NotChecked=0, Total=3422 [2022-03-03 19:47:19,271 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:19,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 97 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2069 states. [2022-03-03 19:47:19,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2069 to 1761. [2022-03-03 19:47:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1761 states, 1760 states have (on average 2.513068181818182) internal successors, (4423), 1760 states have internal predecessors, (4423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 4423 transitions. [2022-03-03 19:47:19,291 INFO L78 Accepts]: Start accepts. Automaton has 1761 states and 4423 transitions. Word has length 28 [2022-03-03 19:47:19,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:19,291 INFO L470 AbstractCegarLoop]: Abstraction has 1761 states and 4423 transitions. [2022-03-03 19:47:19,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:19,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1761 states and 4423 transitions. [2022-03-03 19:47:19,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:19,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:19,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:19,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:19,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-03 19:47:19,509 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:19,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1571411288, now seen corresponding path program 58 times [2022-03-03 19:47:19,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:19,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113323290] [2022-03-03 19:47:19,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:19,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:19,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:19,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113323290] [2022-03-03 19:47:19,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113323290] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:19,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905665550] [2022-03-03 19:47:19,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:19,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:19,600 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:19,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:19,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-03 19:47:19,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:19,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:19,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:19,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905665550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:19,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:19,975 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-03 19:47:19,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551554352] [2022-03-03 19:47:19,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:19,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:19,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:19,975 INFO L87 Difference]: Start difference. First operand 1761 states and 4423 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:20,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:20,763 INFO L93 Difference]: Finished difference Result 2379 states and 5765 transitions. [2022-03-03 19:47:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:47:20,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:20,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:20,767 INFO L225 Difference]: With dead ends: 2379 [2022-03-03 19:47:20,767 INFO L226 Difference]: Without dead ends: 2367 [2022-03-03 19:47:20,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=882, Invalid=2310, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:47:20,768 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 272 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:20,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 101 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:20,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2022-03-03 19:47:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 1864. [2022-03-03 19:47:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.526033279656468) internal successors, (4706), 1863 states have internal predecessors, (4706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:20,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4706 transitions. [2022-03-03 19:47:20,820 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4706 transitions. Word has length 28 [2022-03-03 19:47:20,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:20,820 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4706 transitions. [2022-03-03 19:47:20,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:20,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4706 transitions. [2022-03-03 19:47:20,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:20,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:20,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:20,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:21,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-03-03 19:47:21,047 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:21,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1126878266, now seen corresponding path program 59 times [2022-03-03 19:47:21,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:21,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758113788] [2022-03-03 19:47:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:21,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:21,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:21,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758113788] [2022-03-03 19:47:21,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758113788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:21,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990276167] [2022-03-03 19:47:21,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:21,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:21,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:21,140 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:21,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-03 19:47:21,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-03 19:47:21,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:21,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:21,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:21,434 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:21,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990276167] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:21,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:21,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-03 19:47:21,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394636283] [2022-03-03 19:47:21,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:21,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:21,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:21,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:21,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:21,436 INFO L87 Difference]: Start difference. First operand 1864 states and 4706 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:21,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:21,891 INFO L93 Difference]: Finished difference Result 2488 states and 5987 transitions. [2022-03-03 19:47:21,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:47:21,892 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:21,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:21,895 INFO L225 Difference]: With dead ends: 2488 [2022-03-03 19:47:21,895 INFO L226 Difference]: Without dead ends: 2474 [2022-03-03 19:47:21,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=986, Invalid=2554, Unknown=0, NotChecked=0, Total=3540 [2022-03-03 19:47:21,896 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:21,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 141 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:21,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2474 states. [2022-03-03 19:47:21,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2474 to 1917. [2022-03-03 19:47:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1917 states, 1916 states have (on average 2.5328810020876826) internal successors, (4853), 1916 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) [2022-03-03 19:47:21,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1917 states to 1917 states and 4853 transitions. [2022-03-03 19:47:21,924 INFO L78 Accepts]: Start accepts. Automaton has 1917 states and 4853 transitions. Word has length 28 [2022-03-03 19:47:21,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:21,924 INFO L470 AbstractCegarLoop]: Abstraction has 1917 states and 4853 transitions. [2022-03-03 19:47:21,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:21,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1917 states and 4853 transitions. [2022-03-03 19:47:21,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:21,927 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:21,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:21,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:22,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:22,150 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:22,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:22,150 INFO L85 PathProgramCache]: Analyzing trace with hash 681233606, now seen corresponding path program 60 times [2022-03-03 19:47:22,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:22,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172300048] [2022-03-03 19:47:22,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:22,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:22,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:22,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:22,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172300048] [2022-03-03 19:47:22,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172300048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:22,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819754816] [2022-03-03 19:47:22,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:22,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:22,228 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:22,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-03 19:47:22,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 19:47:22,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:22,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:22,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:22,441 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:22,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:22,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819754816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:22,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:22,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:47:22,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006907860] [2022-03-03 19:47:22,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:22,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:22,540 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:22,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:22,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:22,541 INFO L87 Difference]: Start difference. First operand 1917 states and 4853 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:22,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:22,996 INFO L93 Difference]: Finished difference Result 2707 states and 6510 transitions. [2022-03-03 19:47:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-03 19:47:22,996 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:22,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:22,999 INFO L225 Difference]: With dead ends: 2707 [2022-03-03 19:47:22,999 INFO L226 Difference]: Without dead ends: 2685 [2022-03-03 19:47:23,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1058 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=999, Invalid=2661, Unknown=0, NotChecked=0, Total=3660 [2022-03-03 19:47:23,000 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 263 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:23,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 136 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:23,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2022-03-03 19:47:23,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 1814. [2022-03-03 19:47:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1814 states, 1813 states have (on average 2.518477661334804) internal successors, (4566), 1813 states have internal predecessors, (4566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:23,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1814 states to 1814 states and 4566 transitions. [2022-03-03 19:47:23,030 INFO L78 Accepts]: Start accepts. Automaton has 1814 states and 4566 transitions. Word has length 28 [2022-03-03 19:47:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:23,030 INFO L470 AbstractCegarLoop]: Abstraction has 1814 states and 4566 transitions. [2022-03-03 19:47:23,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:23,031 INFO L276 IsEmpty]: Start isEmpty. Operand 1814 states and 4566 transitions. [2022-03-03 19:47:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:23,033 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:23,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:23,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:23,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:23,249 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:23,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1834776692, now seen corresponding path program 61 times [2022-03-03 19:47:23,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:23,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16444313] [2022-03-03 19:47:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:23,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:23,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:23,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16444313] [2022-03-03 19:47:23,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16444313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:23,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048447951] [2022-03-03 19:47:23,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:23,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:23,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:23,342 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:23,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-03 19:47:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:23,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:23,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:23,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:23,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048447951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:23,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:23,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-03 19:47:23,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54112520] [2022-03-03 19:47:23,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:23,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-03 19:47:23,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:23,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-03 19:47:23,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2022-03-03 19:47:23,559 INFO L87 Difference]: Start difference. First operand 1814 states and 4566 transitions. Second operand has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:24,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:24,241 INFO L93 Difference]: Finished difference Result 2769 states and 6415 transitions. [2022-03-03 19:47:24,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:47:24,242 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:24,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:24,245 INFO L225 Difference]: With dead ends: 2769 [2022-03-03 19:47:24,245 INFO L226 Difference]: Without dead ends: 2769 [2022-03-03 19:47:24,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1438, Invalid=3964, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:47:24,246 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 348 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:24,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 231 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2769 states. [2022-03-03 19:47:24,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2769 to 1600. [2022-03-03 19:47:24,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1600 states, 1599 states have (on average 2.4809255784865543) internal successors, (3967), 1599 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:24,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1600 states to 1600 states and 3967 transitions. [2022-03-03 19:47:24,272 INFO L78 Accepts]: Start accepts. Automaton has 1600 states and 3967 transitions. Word has length 28 [2022-03-03 19:47:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 1600 states and 3967 transitions. [2022-03-03 19:47:24,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.3703703703703702) internal successors, (64), 26 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1600 states and 3967 transitions. [2022-03-03 19:47:24,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:24,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:24,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:24,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:24,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-03 19:47:24,475 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:24,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:24,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1049648184, now seen corresponding path program 62 times [2022-03-03 19:47:24,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:24,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331405917] [2022-03-03 19:47:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:24,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:24,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:24,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331405917] [2022-03-03 19:47:24,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331405917] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:24,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133049037] [2022-03-03 19:47:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:24,550 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-03 19:47:24,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:24,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:24,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:24,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:24,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:24,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:24,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:24,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133049037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:24,870 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:24,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:47:24,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380869260] [2022-03-03 19:47:24,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:24,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:24,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:24,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:24,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:24,871 INFO L87 Difference]: Start difference. First operand 1600 states and 3967 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:25,537 INFO L93 Difference]: Finished difference Result 2024 states and 4735 transitions. [2022-03-03 19:47:25,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-03 19:47:25,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:25,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:25,540 INFO L225 Difference]: With dead ends: 2024 [2022-03-03 19:47:25,540 INFO L226 Difference]: Without dead ends: 1985 [2022-03-03 19:47:25,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 917 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=2372, Unknown=0, NotChecked=0, Total=3192 [2022-03-03 19:47:25,540 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:25,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 181 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:25,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1985 states. [2022-03-03 19:47:25,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1985 to 1546. [2022-03-03 19:47:25,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.4679611650485436) internal successors, (3813), 1545 states have internal predecessors, (3813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:25,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3813 transitions. [2022-03-03 19:47:25,558 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3813 transitions. Word has length 28 [2022-03-03 19:47:25,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:25,558 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 3813 transitions. [2022-03-03 19:47:25,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:25,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3813 transitions. [2022-03-03 19:47:25,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:25,560 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:25,560 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:25,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:25,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-03 19:47:25,776 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:25,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1729324172, now seen corresponding path program 63 times [2022-03-03 19:47:25,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:25,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107790497] [2022-03-03 19:47:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:25,856 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:25,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:25,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107790497] [2022-03-03 19:47:25,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107790497] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:25,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163881785] [2022-03-03 19:47:25,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:25,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:25,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:25,858 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:25,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-03 19:47:25,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:47:25,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:25,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:25,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:26,068 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:26,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:26,212 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163881785] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:26,212 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:26,212 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-03-03 19:47:26,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900295743] [2022-03-03 19:47:26,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:26,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:47:26,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:26,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:47:26,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:47:26,213 INFO L87 Difference]: Start difference. First operand 1546 states and 3813 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:27,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:27,127 INFO L93 Difference]: Finished difference Result 2758 states and 6361 transitions. [2022-03-03 19:47:27,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-03 19:47:27,128 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:27,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:27,131 INFO L225 Difference]: With dead ends: 2758 [2022-03-03 19:47:27,131 INFO L226 Difference]: Without dead ends: 2758 [2022-03-03 19:47:27,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1855, Invalid=4625, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:47:27,132 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 336 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 255 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:47:27,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2022-03-03 19:47:27,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1630. [2022-03-03 19:47:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1630 states, 1629 states have (on average 2.4487415592387967) internal successors, (3989), 1629 states have internal predecessors, (3989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:27,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1630 states to 1630 states and 3989 transitions. [2022-03-03 19:47:27,195 INFO L78 Accepts]: Start accepts. Automaton has 1630 states and 3989 transitions. Word has length 28 [2022-03-03 19:47:27,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:27,195 INFO L470 AbstractCegarLoop]: Abstraction has 1630 states and 3989 transitions. [2022-03-03 19:47:27,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:27,195 INFO L276 IsEmpty]: Start isEmpty. Operand 1630 states and 3989 transitions. [2022-03-03 19:47:27,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:27,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:27,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:27,213 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-03 19:47:27,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:27,400 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:27,400 INFO L85 PathProgramCache]: Analyzing trace with hash -819162124, now seen corresponding path program 64 times [2022-03-03 19:47:27,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:27,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453921104] [2022-03-03 19:47:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:27,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:27,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:27,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453921104] [2022-03-03 19:47:27,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453921104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:27,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279029036] [2022-03-03 19:47:27,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:27,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:27,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:27,451 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:27,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-03 19:47:27,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:27,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:27,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:27,682 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:27,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279029036] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:27,682 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:27,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-03 19:47:27,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29224860] [2022-03-03 19:47:27,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:27,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:27,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:27,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:27,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=446, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:27,683 INFO L87 Difference]: Start difference. First operand 1630 states and 3989 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:28,214 INFO L93 Difference]: Finished difference Result 1964 states and 4612 transitions. [2022-03-03 19:47:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-03 19:47:28,214 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:28,217 INFO L225 Difference]: With dead ends: 1964 [2022-03-03 19:47:28,217 INFO L226 Difference]: Without dead ends: 1946 [2022-03-03 19:47:28,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=758, Invalid=2104, Unknown=0, NotChecked=0, Total=2862 [2022-03-03 19:47:28,217 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 214 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:28,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 122 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-03 19:47:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1629. [2022-03-03 19:47:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1629 states, 1628 states have (on average 2.447788697788698) internal successors, (3985), 1628 states have internal predecessors, (3985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1629 states to 1629 states and 3985 transitions. [2022-03-03 19:47:28,237 INFO L78 Accepts]: Start accepts. Automaton has 1629 states and 3985 transitions. Word has length 28 [2022-03-03 19:47:28,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:28,237 INFO L470 AbstractCegarLoop]: Abstraction has 1629 states and 3985 transitions. [2022-03-03 19:47:28,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:28,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1629 states and 3985 transitions. [2022-03-03 19:47:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:28,239 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:28,240 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:28,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:28,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-03 19:47:28,455 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:28,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:28,456 INFO L85 PathProgramCache]: Analyzing trace with hash 617050672, now seen corresponding path program 65 times [2022-03-03 19:47:28,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:28,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012891407] [2022-03-03 19:47:28,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:28,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:28,527 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:28,528 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:28,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012891407] [2022-03-03 19:47:28,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012891407] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:28,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028559160] [2022-03-03 19:47:28,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:28,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:28,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:28,529 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:28,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-03 19:47:28,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:47:28,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:28,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:28,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:28,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028559160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:28,879 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:28,879 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 25 [2022-03-03 19:47:28,879 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727752175] [2022-03-03 19:47:28,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-03 19:47:28,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-03 19:47:28,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2022-03-03 19:47:28,879 INFO L87 Difference]: Start difference. First operand 1629 states and 3985 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:29,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:29,962 INFO L93 Difference]: Finished difference Result 3359 states and 7975 transitions. [2022-03-03 19:47:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-03 19:47:29,963 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:29,967 INFO L225 Difference]: With dead ends: 3359 [2022-03-03 19:47:29,968 INFO L226 Difference]: Without dead ends: 3359 [2022-03-03 19:47:29,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3415 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2555, Invalid=6187, Unknown=0, NotChecked=0, Total=8742 [2022-03-03 19:47:29,969 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:29,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 214 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3359 states. [2022-03-03 19:47:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3359 to 2498. [2022-03-03 19:47:30,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2498 states, 2497 states have (on average 2.528233880656788) internal successors, (6313), 2497 states have internal predecessors, (6313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:30,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2498 states to 2498 states and 6313 transitions. [2022-03-03 19:47:30,013 INFO L78 Accepts]: Start accepts. Automaton has 2498 states and 6313 transitions. Word has length 28 [2022-03-03 19:47:30,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:30,013 INFO L470 AbstractCegarLoop]: Abstraction has 2498 states and 6313 transitions. [2022-03-03 19:47:30,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:30,013 INFO L276 IsEmpty]: Start isEmpty. Operand 2498 states and 6313 transitions. [2022-03-03 19:47:30,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:30,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:30,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:30,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-03 19:47:30,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-03 19:47:30,236 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:30,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:30,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1135030552, now seen corresponding path program 66 times [2022-03-03 19:47:30,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:30,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611340947] [2022-03-03 19:47:30,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:30,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:30,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:30,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611340947] [2022-03-03 19:47:30,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611340947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:30,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396963605] [2022-03-03 19:47:30,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:30,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:30,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:30,302 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:30,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-03 19:47:30,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:47:30,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:30,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:30,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:30,547 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:30,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396963605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:30,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:30,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 24 [2022-03-03 19:47:30,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193748414] [2022-03-03 19:47:30,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:30,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:30,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:30,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:30,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:30,548 INFO L87 Difference]: Start difference. First operand 2498 states and 6313 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:31,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:31,342 INFO L93 Difference]: Finished difference Result 3045 states and 7377 transitions. [2022-03-03 19:47:31,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:47:31,342 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:31,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:31,345 INFO L225 Difference]: With dead ends: 3045 [2022-03-03 19:47:31,346 INFO L226 Difference]: Without dead ends: 3041 [2022-03-03 19:47:31,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1432, Invalid=3538, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:47:31,346 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 341 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:31,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 86 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:31,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3041 states. [2022-03-03 19:47:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3041 to 2472. [2022-03-03 19:47:31,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2472 states, 2471 states have (on average 2.525698097936058) internal successors, (6241), 2471 states have internal predecessors, (6241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2472 states to 2472 states and 6241 transitions. [2022-03-03 19:47:31,377 INFO L78 Accepts]: Start accepts. Automaton has 2472 states and 6241 transitions. Word has length 28 [2022-03-03 19:47:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:31,377 INFO L470 AbstractCegarLoop]: Abstraction has 2472 states and 6241 transitions. [2022-03-03 19:47:31,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 24 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 2472 states and 6241 transitions. [2022-03-03 19:47:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:31,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:31,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:31,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:31,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:31,595 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:31,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:31,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1641376818, now seen corresponding path program 67 times [2022-03-03 19:47:31,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:31,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980492581] [2022-03-03 19:47:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:31,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:31,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980492581] [2022-03-03 19:47:31,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980492581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:31,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011279417] [2022-03-03 19:47:31,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:31,643 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:31,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-03 19:47:31,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:31,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:31,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:31,835 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:31,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:31,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011279417] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:31,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:31,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 24 [2022-03-03 19:47:31,974 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171327059] [2022-03-03 19:47:31,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:31,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:31,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:31,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:31,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:31,975 INFO L87 Difference]: Start difference. First operand 2472 states and 6241 transitions. Second operand has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:32,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:32,789 INFO L93 Difference]: Finished difference Result 3267 states and 7923 transitions. [2022-03-03 19:47:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:47:32,789 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:32,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:32,793 INFO L225 Difference]: With dead ends: 3267 [2022-03-03 19:47:32,793 INFO L226 Difference]: Without dead ends: 3255 [2022-03-03 19:47:32,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1250, Invalid=3172, Unknown=0, NotChecked=0, Total=4422 [2022-03-03 19:47:32,794 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 311 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:32,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 95 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:32,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3255 states. [2022-03-03 19:47:32,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3255 to 2666. [2022-03-03 19:47:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.5395872420262666) internal successors, (6768), 2665 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 6768 transitions. [2022-03-03 19:47:32,849 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 6768 transitions. Word has length 28 [2022-03-03 19:47:32,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:32,849 INFO L470 AbstractCegarLoop]: Abstraction has 2666 states and 6768 transitions. [2022-03-03 19:47:32,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.44) internal successors, (61), 24 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 6768 transitions. [2022-03-03 19:47:32,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:32,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:32,853 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:32,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:33,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-03-03 19:47:33,067 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:33,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:33,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1868598198, now seen corresponding path program 68 times [2022-03-03 19:47:33,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:33,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792055432] [2022-03-03 19:47:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:33,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:47:33,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:33,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792055432] [2022-03-03 19:47:33,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792055432] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:33,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148669777] [2022-03-03 19:47:33,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:33,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:33,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:33,136 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:33,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-03 19:47:33,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:33,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:33,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:33,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:33,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:33,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148669777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:33,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:33,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-03-03 19:47:33,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800123995] [2022-03-03 19:47:33,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:33,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:33,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:33,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:33,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:33,358 INFO L87 Difference]: Start difference. First operand 2666 states and 6768 transitions. Second operand has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:33,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:33,959 INFO L93 Difference]: Finished difference Result 3608 states and 8768 transitions. [2022-03-03 19:47:33,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:47:33,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:33,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:33,963 INFO L225 Difference]: With dead ends: 3608 [2022-03-03 19:47:33,963 INFO L226 Difference]: Without dead ends: 3588 [2022-03-03 19:47:33,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1194, Invalid=3096, Unknown=0, NotChecked=0, Total=4290 [2022-03-03 19:47:33,966 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 305 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:33,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 121 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:47:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3588 states. [2022-03-03 19:47:33,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3588 to 2939. [2022-03-03 19:47:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2938 states have (on average 2.5517358747447245) internal successors, (7497), 2938 states have internal predecessors, (7497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 7497 transitions. [2022-03-03 19:47:34,005 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 7497 transitions. Word has length 28 [2022-03-03 19:47:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:34,006 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 7497 transitions. [2022-03-03 19:47:34,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.36) internal successors, (59), 24 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 7497 transitions. [2022-03-03 19:47:34,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-03 19:47:34,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:34,009 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:34,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:34,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:34,218 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:34,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:34,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1185012282, now seen corresponding path program 69 times [2022-03-03 19:47:34,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:34,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087256401] [2022-03-03 19:47:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:34,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:34,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:34,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087256401] [2022-03-03 19:47:34,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087256401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:34,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915084790] [2022-03-03 19:47:34,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:34,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:34,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:34,293 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:34,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-03 19:47:34,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:47:34,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:34,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-03 19:47:34,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:34,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:34,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915084790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:34,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:34,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-03 19:47:34,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132183833] [2022-03-03 19:47:34,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-03 19:47:34,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-03 19:47:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2022-03-03 19:47:34,607 INFO L87 Difference]: Start difference. First operand 2939 states and 7497 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:35,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:35,067 INFO L93 Difference]: Finished difference Result 3723 states and 9138 transitions. [2022-03-03 19:47:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-03 19:47:35,068 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-03 19:47:35,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:35,073 INFO L225 Difference]: With dead ends: 3723 [2022-03-03 19:47:35,073 INFO L226 Difference]: Without dead ends: 3695 [2022-03-03 19:47:35,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1020, Invalid=2762, Unknown=0, NotChecked=0, Total=3782 [2022-03-03 19:47:35,093 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 342 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:35,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 97 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-03 19:47:35,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3695 states. [2022-03-03 19:47:35,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3695 to 3119. [2022-03-03 19:47:35,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3119 states, 3118 states have (on average 2.5593329057087875) internal successors, (7980), 3118 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:35,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3119 states to 3119 states and 7980 transitions. [2022-03-03 19:47:35,136 INFO L78 Accepts]: Start accepts. Automaton has 3119 states and 7980 transitions. Word has length 28 [2022-03-03 19:47:35,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:35,137 INFO L470 AbstractCegarLoop]: Abstraction has 3119 states and 7980 transitions. [2022-03-03 19:47:35,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:35,137 INFO L276 IsEmpty]: Start isEmpty. Operand 3119 states and 7980 transitions. [2022-03-03 19:47:35,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:35,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:35,142 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:35,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:35,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:35,351 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -114447712, now seen corresponding path program 70 times [2022-03-03 19:47:35,352 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:35,352 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938666340] [2022-03-03 19:47:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:35,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:35,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:35,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938666340] [2022-03-03 19:47:35,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938666340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:35,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359567190] [2022-03-03 19:47:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:47:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:35,756 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:35,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-03 19:47:35,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:47:35,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:35,778 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:47:35,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:36,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:47:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:36,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:36,599 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:47:36,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:47:36,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:36,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:36,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:47:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:36,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359567190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:36,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:36,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:47:36,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100232662] [2022-03-03 19:47:36,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:36,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:36,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:36,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:36,922 INFO L87 Difference]: Start difference. First operand 3119 states and 7980 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:38,671 INFO L93 Difference]: Finished difference Result 4166 states and 10459 transitions. [2022-03-03 19:47:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:47:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:38,676 INFO L225 Difference]: With dead ends: 4166 [2022-03-03 19:47:38,676 INFO L226 Difference]: Without dead ends: 4159 [2022-03-03 19:47:38,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=574, Invalid=4976, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:47:38,677 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 135 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:38,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 228 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 660 Invalid, 0 Unknown, 296 Unchecked, 0.3s Time] [2022-03-03 19:47:38,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2022-03-03 19:47:38,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3197. [2022-03-03 19:47:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3197 states, 3196 states have (on average 2.5528785982478097) internal successors, (8159), 3196 states have internal predecessors, (8159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:38,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3197 states to 3197 states and 8159 transitions. [2022-03-03 19:47:38,722 INFO L78 Accepts]: Start accepts. Automaton has 3197 states and 8159 transitions. Word has length 30 [2022-03-03 19:47:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:38,722 INFO L470 AbstractCegarLoop]: Abstraction has 3197 states and 8159 transitions. [2022-03-03 19:47:38,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:38,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3197 states and 8159 transitions. [2022-03-03 19:47:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:38,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:38,725 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:38,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:38,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:38,940 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:38,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:38,941 INFO L85 PathProgramCache]: Analyzing trace with hash 942240232, now seen corresponding path program 71 times [2022-03-03 19:47:38,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:38,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470473946] [2022-03-03 19:47:38,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:38,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:39,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:39,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470473946] [2022-03-03 19:47:39,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470473946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:39,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016449028] [2022-03-03 19:47:39,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:47:39,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:39,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:39,167 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:39,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-03 19:47:39,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:47:39,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:39,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:47:39,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:39,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:39,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:39,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:39,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:39,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:39,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:47:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:39,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:39,875 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:47:39,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:47:40,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:40,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:40,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:47:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:40,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016449028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:40,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:40,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:47:40,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930206346] [2022-03-03 19:47:40,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:40,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:40,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:40,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:40,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:40,408 INFO L87 Difference]: Start difference. First operand 3197 states and 8159 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:42,320 INFO L93 Difference]: Finished difference Result 4404 states and 11005 transitions. [2022-03-03 19:47:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:47:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:42,326 INFO L225 Difference]: With dead ends: 4404 [2022-03-03 19:47:42,327 INFO L226 Difference]: Without dead ends: 4401 [2022-03-03 19:47:42,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:47:42,328 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 167 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 1104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 417 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:42,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 210 Invalid, 1104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 599 Invalid, 0 Unknown, 417 Unchecked, 0.3s Time] [2022-03-03 19:47:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2022-03-03 19:47:42,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3295. [2022-03-03 19:47:42,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3295 states, 3294 states have (on average 2.546448087431694) internal successors, (8388), 3294 states have internal predecessors, (8388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3295 states to 3295 states and 8388 transitions. [2022-03-03 19:47:42,375 INFO L78 Accepts]: Start accepts. Automaton has 3295 states and 8388 transitions. Word has length 30 [2022-03-03 19:47:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 3295 states and 8388 transitions. [2022-03-03 19:47:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 3295 states and 8388 transitions. [2022-03-03 19:47:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:42,379 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:42,379 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:42,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:42,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-03 19:47:42,595 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -631993436, now seen corresponding path program 72 times [2022-03-03 19:47:42,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:42,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850203361] [2022-03-03 19:47:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:42,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:42,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:42,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850203361] [2022-03-03 19:47:42,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850203361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:42,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95615944] [2022-03-03 19:47:42,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:47:42,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:42,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:42,851 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:42,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-03 19:47:42,876 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:47:42,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:42,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:47:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:47:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:43,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:43,581 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:47:43,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:47:43,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:43,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:47:44,012 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:44,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95615944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:44,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:44,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:47:44,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421222514] [2022-03-03 19:47:44,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:44,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:44,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:44,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:44,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:44,013 INFO L87 Difference]: Start difference. First operand 3295 states and 8388 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:45,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:45,721 INFO L93 Difference]: Finished difference Result 4374 states and 10904 transitions. [2022-03-03 19:47:45,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:47:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:45,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:45,726 INFO L225 Difference]: With dead ends: 4374 [2022-03-03 19:47:45,726 INFO L226 Difference]: Without dead ends: 4371 [2022-03-03 19:47:45,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=526, Invalid=4586, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:47:45,727 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 118 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 273 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:45,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 233 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 668 Invalid, 0 Unknown, 273 Unchecked, 0.3s Time] [2022-03-03 19:47:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2022-03-03 19:47:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3320. [2022-03-03 19:47:45,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3320 states, 3319 states have (on average 2.5432359144320578) internal successors, (8441), 3319 states have internal predecessors, (8441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3320 states to 3320 states and 8441 transitions. [2022-03-03 19:47:45,768 INFO L78 Accepts]: Start accepts. Automaton has 3320 states and 8441 transitions. Word has length 30 [2022-03-03 19:47:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 3320 states and 8441 transitions. [2022-03-03 19:47:45,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3320 states and 8441 transitions. [2022-03-03 19:47:45,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:45,771 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:45,771 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:45,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:45,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:45,978 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:45,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:45,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1642060192, now seen corresponding path program 73 times [2022-03-03 19:47:45,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:45,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586658782] [2022-03-03 19:47:45,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:45,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:46,311 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586658782] [2022-03-03 19:47:46,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586658782] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:46,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608980481] [2022-03-03 19:47:46,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:47:46,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:46,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:46,313 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:46,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-03 19:47:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:46,342 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:47:46,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:46,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:46,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:46,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:46,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:46,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:47:46,692 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:46,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:47,171 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:47:47,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:47:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,676 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:47,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:47,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:47:47,716 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:47,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608980481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:47,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:47,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:47:47,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403711867] [2022-03-03 19:47:47,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:47,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:47,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:47,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:47,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:47,723 INFO L87 Difference]: Start difference. First operand 3320 states and 8441 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:49,240 INFO L93 Difference]: Finished difference Result 4463 states and 11078 transitions. [2022-03-03 19:47:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:47:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:49,245 INFO L225 Difference]: With dead ends: 4463 [2022-03-03 19:47:49,245 INFO L226 Difference]: Without dead ends: 4460 [2022-03-03 19:47:49,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 48 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=536, Invalid=4576, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:47:49,245 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:49,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 224 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 611 Invalid, 0 Unknown, 502 Unchecked, 0.3s Time] [2022-03-03 19:47:49,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2022-03-03 19:47:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3376. [2022-03-03 19:47:49,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3376 states, 3375 states have (on average 2.5374814814814814) internal successors, (8564), 3375 states have internal predecessors, (8564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3376 states to 3376 states and 8564 transitions. [2022-03-03 19:47:49,332 INFO L78 Accepts]: Start accepts. Automaton has 3376 states and 8564 transitions. Word has length 30 [2022-03-03 19:47:49,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:49,332 INFO L470 AbstractCegarLoop]: Abstraction has 3376 states and 8564 transitions. [2022-03-03 19:47:49,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:49,332 INFO L276 IsEmpty]: Start isEmpty. Operand 3376 states and 8564 transitions. [2022-03-03 19:47:49,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:49,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:49,335 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:49,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-03 19:47:49,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:49,551 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:49,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:49,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1653603812, now seen corresponding path program 74 times [2022-03-03 19:47:49,551 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:49,551 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382978693] [2022-03-03 19:47:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:49,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:49,865 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:49,866 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:49,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382978693] [2022-03-03 19:47:49,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382978693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:49,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101226841] [2022-03-03 19:47:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:47:49,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:49,868 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-03 19:47:49,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:47:49,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:49,893 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:47:49,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:50,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:50,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:50,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:50,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:50,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:47:50,322 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:50,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:50,710 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:47:50,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:47:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:51,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:51,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:51,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:47:51,318 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:51,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101226841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:47:51,318 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:47:51,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:47:51,318 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917997198] [2022-03-03 19:47:51,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:47:51,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:47:51,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:47:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:47:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:47:51,319 INFO L87 Difference]: Start difference. First operand 3376 states and 8564 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:47:53,405 INFO L93 Difference]: Finished difference Result 4650 states and 11509 transitions. [2022-03-03 19:47:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:47:53,406 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:47:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:47:53,411 INFO L225 Difference]: With dead ends: 4650 [2022-03-03 19:47:53,412 INFO L226 Difference]: Without dead ends: 4647 [2022-03-03 19:47:53,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 51 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=667, Invalid=5653, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:47:53,412 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 132 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 942 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 234 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:47:53,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 224 Invalid, 942 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 639 Invalid, 0 Unknown, 234 Unchecked, 0.3s Time] [2022-03-03 19:47:53,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4647 states. [2022-03-03 19:47:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4647 to 3449. [2022-03-03 19:47:53,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 2.5336426914153134) internal successors, (8736), 3448 states have internal predecessors, (8736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 8736 transitions. [2022-03-03 19:47:53,484 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 8736 transitions. Word has length 30 [2022-03-03 19:47:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:47:53,484 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 8736 transitions. [2022-03-03 19:47:53,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:47:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 8736 transitions. [2022-03-03 19:47:53,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:47:53,488 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:47:53,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:47:53,503 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-03 19:47:53,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-03 19:47:53,704 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:47:53,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:47:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash -822693660, now seen corresponding path program 75 times [2022-03-03 19:47:53,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:47:53,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811864969] [2022-03-03 19:47:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:47:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:47:53,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:47:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:53,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:47:53,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811864969] [2022-03-03 19:47:53,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811864969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:47:53,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644408103] [2022-03-03 19:47:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:47:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:47:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:47:54,000 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:47:54,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-03 19:47:54,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:47:54,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:47:54,023 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:47:54,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:47:54,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:54,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:54,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:54,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:54,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:54,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:47:54,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:54,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:47:54,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-03 19:47:55,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:47:55,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:47:56,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:47:56,957 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-03 19:47:56,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-03 19:48:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:37,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644408103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:37,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:37,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-03 19:48:37,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778511056] [2022-03-03 19:48:37,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:37,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:48:37,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:37,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:48:37,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:48:37,638 INFO L87 Difference]: Start difference. First operand 3449 states and 8736 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:39,867 INFO L93 Difference]: Finished difference Result 4822 states and 11870 transitions. [2022-03-03 19:48:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:48:39,867 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:39,873 INFO L225 Difference]: With dead ends: 4822 [2022-03-03 19:48:39,873 INFO L226 Difference]: Without dead ends: 4808 [2022-03-03 19:48:39,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 39 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1696 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=689, Invalid=5631, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:48:39,874 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1203 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:39,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 248 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 330 Invalid, 0 Unknown, 1203 Unchecked, 0.2s Time] [2022-03-03 19:48:39,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2022-03-03 19:48:39,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 3627. [2022-03-03 19:48:39,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 2.532542746828461) internal successors, (9183), 3626 states have internal predecessors, (9183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 9183 transitions. [2022-03-03 19:48:39,926 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 9183 transitions. Word has length 30 [2022-03-03 19:48:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:39,926 INFO L470 AbstractCegarLoop]: Abstraction has 3627 states and 9183 transitions. [2022-03-03 19:48:39,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 9183 transitions. [2022-03-03 19:48:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:39,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:39,930 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:39,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:40,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-03-03 19:48:40,147 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:40,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:40,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1881646240, now seen corresponding path program 76 times [2022-03-03 19:48:40,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:40,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830194327] [2022-03-03 19:48:40,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:40,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:40,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:40,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830194327] [2022-03-03 19:48:40,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830194327] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:40,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358882671] [2022-03-03 19:48:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:48:40,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:40,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:40,448 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:40,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-03 19:48:40,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:48:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:40,473 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:48:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:40,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:40,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:40,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:48:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:40,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:41,364 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:48:41,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:48:41,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,889 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:41,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,891 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:41,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:41,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:48:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:41,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358882671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:41,917 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:41,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:48:41,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187600545] [2022-03-03 19:48:41,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:41,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:41,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:41,918 INFO L87 Difference]: Start difference. First operand 3627 states and 9183 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:43,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:43,700 INFO L93 Difference]: Finished difference Result 5062 states and 12550 transitions. [2022-03-03 19:48:43,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:48:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:43,707 INFO L225 Difference]: With dead ends: 5062 [2022-03-03 19:48:43,707 INFO L226 Difference]: Without dead ends: 5055 [2022-03-03 19:48:43,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=640, Invalid=4910, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:48:43,708 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 176 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:43,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 184 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 662 Invalid, 0 Unknown, 394 Unchecked, 0.3s Time] [2022-03-03 19:48:43,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5055 states. [2022-03-03 19:48:43,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5055 to 3754. [2022-03-03 19:48:43,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3754 states, 3753 states have (on average 2.5329070077271516) internal successors, (9506), 3753 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3754 states to 3754 states and 9506 transitions. [2022-03-03 19:48:43,762 INFO L78 Accepts]: Start accepts. Automaton has 3754 states and 9506 transitions. Word has length 30 [2022-03-03 19:48:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:43,762 INFO L470 AbstractCegarLoop]: Abstraction has 3754 states and 9506 transitions. [2022-03-03 19:48:43,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 3754 states and 9506 transitions. [2022-03-03 19:48:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:43,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:43,766 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:43,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:43,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:43,981 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:43,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:43,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1784027364, now seen corresponding path program 77 times [2022-03-03 19:48:43,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:43,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083472440] [2022-03-03 19:48:43,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:43,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:44,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083472440] [2022-03-03 19:48:44,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083472440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:44,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643694626] [2022-03-03 19:48:44,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:48:44,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:44,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:44,326 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:44,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-03 19:48:44,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:48:44,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:44,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:48:44,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:44,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:44,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:44,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:44,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:44,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:48:44,803 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:44,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:45,225 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:48:45,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:48:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:45,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:45,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:45,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:48:45,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:45,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643694626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:45,534 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:45,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:48:45,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129297391] [2022-03-03 19:48:45,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:45,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:45,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:45,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:45,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:45,535 INFO L87 Difference]: Start difference. First operand 3754 states and 9506 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:47,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:47,867 INFO L93 Difference]: Finished difference Result 4972 states and 12378 transitions. [2022-03-03 19:48:47,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-03 19:48:47,868 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:47,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:47,874 INFO L225 Difference]: With dead ends: 4972 [2022-03-03 19:48:47,874 INFO L226 Difference]: Without dead ends: 4965 [2022-03-03 19:48:47,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=633, Invalid=4769, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:48:47,887 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 455 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:47,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 161 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 772 Invalid, 0 Unknown, 455 Unchecked, 0.5s Time] [2022-03-03 19:48:47,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4965 states. [2022-03-03 19:48:47,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4965 to 3846. [2022-03-03 19:48:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3846 states, 3845 states have (on average 2.5362808842652798) internal successors, (9752), 3845 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:47,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3846 states to 3846 states and 9752 transitions. [2022-03-03 19:48:47,948 INFO L78 Accepts]: Start accepts. Automaton has 3846 states and 9752 transitions. Word has length 30 [2022-03-03 19:48:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:47,948 INFO L470 AbstractCegarLoop]: Abstraction has 3846 states and 9752 transitions. [2022-03-03 19:48:47,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3846 states and 9752 transitions. [2022-03-03 19:48:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:47,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:47,952 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:47,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:48,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:48,153 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:48,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1502641948, now seen corresponding path program 78 times [2022-03-03 19:48:48,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:48,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519902521] [2022-03-03 19:48:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:48,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:48,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:48,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:48,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519902521] [2022-03-03 19:48:48,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519902521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:48,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677149514] [2022-03-03 19:48:48,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:48:48,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:48,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:48,395 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:48,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-03 19:48:48,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:48:48,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:48,455 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:48:48,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:48,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:48:48,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:48,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:49,111 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:48:49,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:48:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,541 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:49,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:48:49,566 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:49,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677149514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:49,566 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:49,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:48:49,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848778117] [2022-03-03 19:48:49,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:49,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:49,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:49,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:49,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:49,567 INFO L87 Difference]: Start difference. First operand 3846 states and 9752 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:51,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:51,448 INFO L93 Difference]: Finished difference Result 5284 states and 13165 transitions. [2022-03-03 19:48:51,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:48:51,448 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:51,454 INFO L225 Difference]: With dead ends: 5284 [2022-03-03 19:48:51,454 INFO L226 Difference]: Without dead ends: 5277 [2022-03-03 19:48:51,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=614, Invalid=4642, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:48:51,455 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 118 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 510 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:51,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 199 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 802 Invalid, 0 Unknown, 510 Unchecked, 0.4s Time] [2022-03-03 19:48:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5277 states. [2022-03-03 19:48:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5277 to 4055. [2022-03-03 19:48:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4055 states, 4054 states have (on average 2.5444005920078934) internal successors, (10315), 4054 states have internal predecessors, (10315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4055 states to 4055 states and 10315 transitions. [2022-03-03 19:48:51,501 INFO L78 Accepts]: Start accepts. Automaton has 4055 states and 10315 transitions. Word has length 30 [2022-03-03 19:48:51,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:51,502 INFO L470 AbstractCegarLoop]: Abstraction has 4055 states and 10315 transitions. [2022-03-03 19:48:51,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:51,502 INFO L276 IsEmpty]: Start isEmpty. Operand 4055 states and 10315 transitions. [2022-03-03 19:48:51,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:51,505 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:51,505 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:51,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:51,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2022-03-03 19:48:51,719 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:51,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:51,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1774381284, now seen corresponding path program 79 times [2022-03-03 19:48:51,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:51,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034695974] [2022-03-03 19:48:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:51,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:52,005 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:52,005 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:52,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034695974] [2022-03-03 19:48:52,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034695974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:52,005 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7441855] [2022-03-03 19:48:52,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:48:52,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:52,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:52,007 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:52,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-03 19:48:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:52,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:48:52,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:52,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:52,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:52,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:52,384 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:52,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:48:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:52,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:52,848 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:48:52,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:48:53,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:53,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:53,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:48:53,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:53,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7441855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:53,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:53,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:48:53,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847765236] [2022-03-03 19:48:53,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:53,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:53,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:53,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:53,377 INFO L87 Difference]: Start difference. First operand 4055 states and 10315 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:54,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:54,819 INFO L93 Difference]: Finished difference Result 5287 states and 13244 transitions. [2022-03-03 19:48:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:48:54,819 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:54,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:54,826 INFO L225 Difference]: With dead ends: 5287 [2022-03-03 19:48:54,826 INFO L226 Difference]: Without dead ends: 5280 [2022-03-03 19:48:54,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=4047, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 19:48:54,827 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:54,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 118 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 490 Invalid, 0 Unknown, 283 Unchecked, 0.2s Time] [2022-03-03 19:48:54,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2022-03-03 19:48:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 4097. [2022-03-03 19:48:54,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4097 states, 4096 states have (on average 2.5498046875) internal successors, (10444), 4096 states have internal predecessors, (10444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:54,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4097 states to 4097 states and 10444 transitions. [2022-03-03 19:48:54,882 INFO L78 Accepts]: Start accepts. Automaton has 4097 states and 10444 transitions. Word has length 30 [2022-03-03 19:48:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:54,882 INFO L470 AbstractCegarLoop]: Abstraction has 4097 states and 10444 transitions. [2022-03-03 19:48:54,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:54,882 INFO L276 IsEmpty]: Start isEmpty. Operand 4097 states and 10444 transitions. [2022-03-03 19:48:54,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:54,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:54,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:54,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:55,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:55,103 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:55,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:55,104 INFO L85 PathProgramCache]: Analyzing trace with hash -550984530, now seen corresponding path program 80 times [2022-03-03 19:48:55,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:55,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819465779] [2022-03-03 19:48:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:55,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:55,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:55,414 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:55,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819465779] [2022-03-03 19:48:55,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819465779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:55,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77275469] [2022-03-03 19:48:55,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:48:55,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:55,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:55,415 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:55,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-03 19:48:55,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:48:55,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:55,437 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:48:55,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:48:55,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:55,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:55,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:48:55,888 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:55,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:48:56,319 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:48:56,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:48:56,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,797 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:48:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:56,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:48:56,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:48:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:56,824 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77275469] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:48:56,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:48:56,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:48:56,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17058915] [2022-03-03 19:48:56,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:48:56,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:48:56,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:48:56,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:48:56,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:48:56,826 INFO L87 Difference]: Start difference. First operand 4097 states and 10444 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:59,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:48:59,319 INFO L93 Difference]: Finished difference Result 5489 states and 13623 transitions. [2022-03-03 19:48:59,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:48:59,320 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:48:59,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:48:59,327 INFO L225 Difference]: With dead ends: 5489 [2022-03-03 19:48:59,327 INFO L226 Difference]: Without dead ends: 5400 [2022-03-03 19:48:59,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1553 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=685, Invalid=5321, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:48:59,328 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 206 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:48:59,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 374 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1062 Invalid, 0 Unknown, 311 Unchecked, 0.6s Time] [2022-03-03 19:48:59,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5400 states. [2022-03-03 19:48:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5400 to 4287. [2022-03-03 19:48:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4287 states, 4286 states have (on average 2.536164255716286) internal successors, (10870), 4286 states have internal predecessors, (10870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:59,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4287 states to 4287 states and 10870 transitions. [2022-03-03 19:48:59,384 INFO L78 Accepts]: Start accepts. Automaton has 4287 states and 10870 transitions. Word has length 30 [2022-03-03 19:48:59,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:48:59,384 INFO L470 AbstractCegarLoop]: Abstraction has 4287 states and 10870 transitions. [2022-03-03 19:48:59,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:48:59,385 INFO L276 IsEmpty]: Start isEmpty. Operand 4287 states and 10870 transitions. [2022-03-03 19:48:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:48:59,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:48:59,390 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:48:59,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-03 19:48:59,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,603 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:48:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:48:59,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1068530254, now seen corresponding path program 81 times [2022-03-03 19:48:59,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:48:59,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734120801] [2022-03-03 19:48:59,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:48:59,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:48:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:48:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:48:59,923 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:48:59,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734120801] [2022-03-03 19:48:59,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734120801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:48:59,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616629153] [2022-03-03 19:48:59,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:48:59,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:48:59,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:48:59,924 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:48:59,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-03 19:48:59,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:48:59,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:48:59,946 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:48:59,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:00,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:00,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:00,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:49:00,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-03 19:49:01,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:01,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:02,765 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-03 19:49:02,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-03 19:49:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:38,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616629153] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:38,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:38,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-03 19:49:38,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441484695] [2022-03-03 19:49:38,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:38,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:49:38,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:49:38,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1400, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:49:38,925 INFO L87 Difference]: Start difference. First operand 4287 states and 10870 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:40,946 INFO L93 Difference]: Finished difference Result 5896 states and 14560 transitions. [2022-03-03 19:49:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:49:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:40,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:40,954 INFO L225 Difference]: With dead ends: 5896 [2022-03-03 19:49:40,954 INFO L226 Difference]: Without dead ends: 5880 [2022-03-03 19:49:40,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=566, Invalid=4690, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:49:40,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 485 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:40,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 168 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 314 Invalid, 0 Unknown, 485 Unchecked, 0.2s Time] [2022-03-03 19:49:40,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2022-03-03 19:49:41,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4291. [2022-03-03 19:49:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4291 states, 4290 states have (on average 2.5356643356643356) internal successors, (10878), 4290 states have internal predecessors, (10878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4291 states to 4291 states and 10878 transitions. [2022-03-03 19:49:41,059 INFO L78 Accepts]: Start accepts. Automaton has 4291 states and 10878 transitions. Word has length 30 [2022-03-03 19:49:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:41,059 INFO L470 AbstractCegarLoop]: Abstraction has 4291 states and 10878 transitions. [2022-03-03 19:49:41,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 4291 states and 10878 transitions. [2022-03-03 19:49:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:41,064 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:41,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:41,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:41,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-03-03 19:49:41,280 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:49:41,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:41,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2127482834, now seen corresponding path program 82 times [2022-03-03 19:49:41,282 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:41,282 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038326018] [2022-03-03 19:49:41,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:41,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:41,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:41,620 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:41,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:41,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038326018] [2022-03-03 19:49:41,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038326018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:41,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768602289] [2022-03-03 19:49:41,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:49:41,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:41,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:41,622 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:41,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-03 19:49:41,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:49:41,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:41,660 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:49:41,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:41,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:41,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:41,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:41,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:41,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:49:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:41,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:42,304 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:49:42,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:49:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:42,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:42,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:42,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:49:42,630 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:42,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768602289] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:42,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:42,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:49:42,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56018404] [2022-03-03 19:49:42,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:42,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:49:42,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:42,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:49:42,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:42,631 INFO L87 Difference]: Start difference. First operand 4291 states and 10878 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:45,071 INFO L93 Difference]: Finished difference Result 5552 states and 13751 transitions. [2022-03-03 19:49:45,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:49:45,071 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:45,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:45,078 INFO L225 Difference]: With dead ends: 5552 [2022-03-03 19:49:45,078 INFO L226 Difference]: Without dead ends: 5453 [2022-03-03 19:49:45,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 7 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=714, Invalid=5448, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:49:45,078 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 550 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:45,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 378 Invalid, 1827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1213 Invalid, 0 Unknown, 550 Unchecked, 0.6s Time] [2022-03-03 19:49:45,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2022-03-03 19:49:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4263. [2022-03-03 19:49:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4263 states, 4262 states have (on average 2.538479587048334) internal successors, (10819), 4262 states have internal predecessors, (10819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:45,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4263 states to 4263 states and 10819 transitions. [2022-03-03 19:49:45,127 INFO L78 Accepts]: Start accepts. Automaton has 4263 states and 10819 transitions. Word has length 30 [2022-03-03 19:49:45,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:45,127 INFO L470 AbstractCegarLoop]: Abstraction has 4263 states and 10819 transitions. [2022-03-03 19:49:45,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:45,127 INFO L276 IsEmpty]: Start isEmpty. Operand 4263 states and 10819 transitions. [2022-03-03 19:49:45,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:45,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:45,146 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:45,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:45,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:45,360 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:49:45,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:45,361 INFO L85 PathProgramCache]: Analyzing trace with hash 938367594, now seen corresponding path program 83 times [2022-03-03 19:49:45,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:45,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721333473] [2022-03-03 19:49:45,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:45,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:45,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:45,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721333473] [2022-03-03 19:49:45,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721333473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:45,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980893522] [2022-03-03 19:49:45,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:49:45,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:45,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:45,609 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:45,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-03 19:49:45,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:49:45,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:45,639 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:49:45,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:45,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:45,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:45,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:45,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:45,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:45,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:49:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:45,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:46,383 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:49:46,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:49:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:46,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:46,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:49:46,878 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:46,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980893522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:46,878 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:46,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:49:46,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031392032] [2022-03-03 19:49:46,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:46,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:49:46,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:46,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:49:46,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:46,879 INFO L87 Difference]: Start difference. First operand 4263 states and 10819 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:49,428 INFO L93 Difference]: Finished difference Result 5582 states and 13851 transitions. [2022-03-03 19:49:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:49:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:49,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:49,435 INFO L225 Difference]: With dead ends: 5582 [2022-03-03 19:49:49,435 INFO L226 Difference]: Without dead ends: 5513 [2022-03-03 19:49:49,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=748, Invalid=5104, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:49:49,436 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 243 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:49,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 301 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1168 Invalid, 0 Unknown, 314 Unchecked, 0.6s Time] [2022-03-03 19:49:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2022-03-03 19:49:49,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 4407. [2022-03-03 19:49:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4407 states, 4406 states have (on average 2.5304130730821606) internal successors, (11149), 4406 states have internal predecessors, (11149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:49,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4407 states to 4407 states and 11149 transitions. [2022-03-03 19:49:49,492 INFO L78 Accepts]: Start accepts. Automaton has 4407 states and 11149 transitions. Word has length 30 [2022-03-03 19:49:49,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:49,492 INFO L470 AbstractCegarLoop]: Abstraction has 4407 states and 11149 transitions. [2022-03-03 19:49:49,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:49,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4407 states and 11149 transitions. [2022-03-03 19:49:49,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:49,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:49,497 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:49,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:49,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:49,712 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:49:49,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:49,713 INFO L85 PathProgramCache]: Analyzing trace with hash 420821870, now seen corresponding path program 84 times [2022-03-03 19:49:49,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:49,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919177561] [2022-03-03 19:49:49,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:49,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:50,048 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:50,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919177561] [2022-03-03 19:49:50,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919177561] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:50,048 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871362197] [2022-03-03 19:49:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:49:50,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:50,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:50,049 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:50,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-03 19:49:50,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:49:50,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:50,071 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:49:50,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:50,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:50,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:50,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:50,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:50,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:50,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:49:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:50,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:50,820 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:49:50,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:49:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:51,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:51,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:51,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:49:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:51,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871362197] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:51,131 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:51,131 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:49:51,131 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143502411] [2022-03-03 19:49:51,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:51,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:49:51,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:51,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:49:51,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:51,132 INFO L87 Difference]: Start difference. First operand 4407 states and 11149 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:53,197 INFO L93 Difference]: Finished difference Result 5498 states and 13608 transitions. [2022-03-03 19:49:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:49:53,197 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:53,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:53,204 INFO L225 Difference]: With dead ends: 5498 [2022-03-03 19:49:53,204 INFO L226 Difference]: Without dead ends: 5475 [2022-03-03 19:49:53,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=727, Invalid=4823, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:49:53,205 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 199 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:53,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 195 Invalid, 1539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1171 Invalid, 0 Unknown, 281 Unchecked, 0.5s Time] [2022-03-03 19:49:53,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5475 states. [2022-03-03 19:49:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5475 to 4391. [2022-03-03 19:49:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4391 states, 4390 states have (on average 2.5300683371298405) internal successors, (11107), 4390 states have internal predecessors, (11107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4391 states to 4391 states and 11107 transitions. [2022-03-03 19:49:53,259 INFO L78 Accepts]: Start accepts. Automaton has 4391 states and 11107 transitions. Word has length 30 [2022-03-03 19:49:53,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:53,259 INFO L470 AbstractCegarLoop]: Abstraction has 4391 states and 11107 transitions. [2022-03-03 19:49:53,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 4391 states and 11107 transitions. [2022-03-03 19:49:53,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:53,263 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:53,263 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:53,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-03 19:49:53,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-03 19:49:53,478 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:49:53,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1854127390, now seen corresponding path program 85 times [2022-03-03 19:49:53,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:53,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462501494] [2022-03-03 19:49:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:53,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:53,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:53,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:53,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462501494] [2022-03-03 19:49:53,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462501494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:53,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456870121] [2022-03-03 19:49:53,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:49:53,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:53,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:53,818 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:53,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-03 19:49:53,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:53,839 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:49:53,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:54,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:54,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:54,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:54,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:54,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:49:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:54,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:54,680 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:49:54,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:49:55,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:55,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:55,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:49:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:55,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456870121] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:55,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:55,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:49:55,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494096139] [2022-03-03 19:49:55,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:55,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:49:55,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:55,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:49:55,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=879, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:49:55,269 INFO L87 Difference]: Start difference. First operand 4391 states and 11107 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:58,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:49:58,017 INFO L93 Difference]: Finished difference Result 5992 states and 14766 transitions. [2022-03-03 19:49:58,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-03 19:49:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:49:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:49:58,025 INFO L225 Difference]: With dead ends: 5992 [2022-03-03 19:49:58,025 INFO L226 Difference]: Without dead ends: 5976 [2022-03-03 19:49:58,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=829, Invalid=6481, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:49:58,026 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:49:58,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 302 Invalid, 1831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:49:58,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2022-03-03 19:49:58,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 4474. [2022-03-03 19:49:58,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.5309635591325734) internal successors, (11321), 4473 states have internal predecessors, (11321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:58,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 11321 transitions. [2022-03-03 19:49:58,083 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 11321 transitions. Word has length 30 [2022-03-03 19:49:58,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:49:58,083 INFO L470 AbstractCegarLoop]: Abstraction has 4474 states and 11321 transitions. [2022-03-03 19:49:58,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:49:58,083 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 11321 transitions. [2022-03-03 19:49:58,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:49:58,087 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:49:58,087 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:49:58,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-03 19:49:58,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:58,289 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:49:58,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:49:58,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1499462230, now seen corresponding path program 86 times [2022-03-03 19:49:58,289 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:49:58,289 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062013396] [2022-03-03 19:49:58,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:49:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:49:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:49:58,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:49:58,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:49:58,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062013396] [2022-03-03 19:49:58,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062013396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:49:58,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924261578] [2022-03-03 19:49:58,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:49:58,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:49:58,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:49:58,540 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:49:58,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-03 19:49:58,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:49:58,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:49:58,565 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:49:58,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:49:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:49:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:49:59,405 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:49:59,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:49:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:49:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:49:59,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:49:59,729 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:49:59,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924261578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:49:59,729 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:49:59,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:49:59,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995845926] [2022-03-03 19:49:59,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:49:59,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:49:59,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:49:59,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:49:59,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:49:59,730 INFO L87 Difference]: Start difference. First operand 4474 states and 11321 transitions. Second operand has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:01,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:01,772 INFO L93 Difference]: Finished difference Result 6009 states and 14790 transitions. [2022-03-03 19:50:01,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:50:01,773 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:01,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:01,781 INFO L225 Difference]: With dead ends: 6009 [2022-03-03 19:50:01,781 INFO L226 Difference]: Without dead ends: 5943 [2022-03-03 19:50:01,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=761, Invalid=4641, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:50:01,782 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 219 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:01,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 233 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 966 Invalid, 0 Unknown, 177 Unchecked, 0.5s Time] [2022-03-03 19:50:01,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5943 states. [2022-03-03 19:50:01,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5943 to 4546. [2022-03-03 19:50:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.5256325632563255) internal successors, (11479), 4545 states have internal predecessors, (11479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11479 transitions. [2022-03-03 19:50:01,853 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11479 transitions. Word has length 30 [2022-03-03 19:50:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:01,854 INFO L470 AbstractCegarLoop]: Abstraction has 4546 states and 11479 transitions. [2022-03-03 19:50:01,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3870967741935485) internal successors, (74), 30 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11479 transitions. [2022-03-03 19:50:01,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:01,887 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:01,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:01,907 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:02,087 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:50:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2043738198, now seen corresponding path program 87 times [2022-03-03 19:50:02,088 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:02,088 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608810984] [2022-03-03 19:50:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:02,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:02,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:02,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:02,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:02,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608810984] [2022-03-03 19:50:02,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608810984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:02,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85362856] [2022-03-03 19:50:02,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:50:02,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:02,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:02,339 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:02,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-03 19:50:02,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:50:02,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:02,363 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:50:02,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:02,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:02,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:02,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 77 treesize of output 119 [2022-03-03 19:50:03,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:03,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:03,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,885 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:03,971 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:03,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-03 19:50:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:16,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85362856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:16,157 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:16,157 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-03 19:50:16,157 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090075878] [2022-03-03 19:50:16,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:16,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:50:16,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:16,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:50:16,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:50:16,158 INFO L87 Difference]: Start difference. First operand 4546 states and 11479 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:24,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:24,309 INFO L93 Difference]: Finished difference Result 6617 states and 15855 transitions. [2022-03-03 19:50:24,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-03 19:50:24,310 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:24,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:24,317 INFO L225 Difference]: With dead ends: 6617 [2022-03-03 19:50:24,317 INFO L226 Difference]: Without dead ends: 6583 [2022-03-03 19:50:24,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 31 SyntacticMatches, 8 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 6498 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=2782, Invalid=16678, Unknown=0, NotChecked=0, Total=19460 [2022-03-03 19:50:24,318 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 574 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 1378 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 574 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 872 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:24,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [574 Valid, 502 Invalid, 2411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1378 Invalid, 0 Unknown, 872 Unchecked, 0.8s Time] [2022-03-03 19:50:24,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6583 states. [2022-03-03 19:50:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6583 to 4542. [2022-03-03 19:50:24,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4542 states, 4541 states have (on average 2.522131689055274) internal successors, (11453), 4541 states have internal predecessors, (11453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4542 states to 4542 states and 11453 transitions. [2022-03-03 19:50:24,386 INFO L78 Accepts]: Start accepts. Automaton has 4542 states and 11453 transitions. Word has length 30 [2022-03-03 19:50:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:24,386 INFO L470 AbstractCegarLoop]: Abstraction has 4542 states and 11453 transitions. [2022-03-03 19:50:24,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 4542 states and 11453 transitions. [2022-03-03 19:50:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:24,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:24,391 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:24,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:24,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:24,606 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:50:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:24,606 INFO L85 PathProgramCache]: Analyzing trace with hash -761180122, now seen corresponding path program 88 times [2022-03-03 19:50:24,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:24,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607958511] [2022-03-03 19:50:24,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:24,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:24,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:24,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607958511] [2022-03-03 19:50:24,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607958511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:24,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370115266] [2022-03-03 19:50:24,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:50:24,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:24,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:24,794 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:24,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-03 19:50:24,817 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:50:24,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:24,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:50:24,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:25,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:25,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:25,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:25,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:25,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:50:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:25,578 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:50:25,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-03 19:50:26,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:26,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:26,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:50:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:26,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370115266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:26,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:26,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-03 19:50:26,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077896670] [2022-03-03 19:50:26,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:26,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:50:26,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:26,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:50:26,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:50:26,031 INFO L87 Difference]: Start difference. First operand 4542 states and 11453 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:28,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:28,003 INFO L93 Difference]: Finished difference Result 5404 states and 13338 transitions. [2022-03-03 19:50:28,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:50:28,003 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:28,011 INFO L225 Difference]: With dead ends: 5404 [2022-03-03 19:50:28,011 INFO L226 Difference]: Without dead ends: 5348 [2022-03-03 19:50:28,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=732, Invalid=4670, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:50:28,013 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 278 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 130 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:28,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 408 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1221 Invalid, 0 Unknown, 130 Unchecked, 0.6s Time] [2022-03-03 19:50:28,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2022-03-03 19:50:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4711. [2022-03-03 19:50:28,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 2.5067940552016985) internal successors, (11807), 4710 states have internal predecessors, (11807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:28,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 11807 transitions. [2022-03-03 19:50:28,086 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 11807 transitions. Word has length 30 [2022-03-03 19:50:28,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:28,086 INFO L470 AbstractCegarLoop]: Abstraction has 4711 states and 11807 transitions. [2022-03-03 19:50:28,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:28,086 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 11807 transitions. [2022-03-03 19:50:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:28,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:28,091 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:28,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:28,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2022-03-03 19:50:28,297 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:50:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 295507822, now seen corresponding path program 89 times [2022-03-03 19:50:28,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:28,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434840661] [2022-03-03 19:50:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:28,586 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:28,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:28,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434840661] [2022-03-03 19:50:28,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434840661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:28,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867705813] [2022-03-03 19:50:28,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:50:28,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:28,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:28,587 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:28,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-03 19:50:28,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 19:50:28,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:28,610 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:50:28,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:28,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:28,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:28,912 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:28,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:50:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:28,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:29,214 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:50:29,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-03 19:50:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:29,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:29,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:50:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:29,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867705813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:50:29,543 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:50:29,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 29 [2022-03-03 19:50:29,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593973717] [2022-03-03 19:50:29,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:50:29,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:50:29,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:50:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:50:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:50:29,544 INFO L87 Difference]: Start difference. First operand 4711 states and 11807 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:50:31,142 INFO L93 Difference]: Finished difference Result 5352 states and 13141 transitions. [2022-03-03 19:50:31,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:50:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:50:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:50:31,149 INFO L225 Difference]: With dead ends: 5352 [2022-03-03 19:50:31,149 INFO L226 Difference]: Without dead ends: 5345 [2022-03-03 19:50:31,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 9 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=642, Invalid=3914, Unknown=0, NotChecked=0, Total=4556 [2022-03-03 19:50:31,149 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 241 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:50:31,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 297 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1154 Invalid, 0 Unknown, 70 Unchecked, 0.5s Time] [2022-03-03 19:50:31,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-03-03 19:50:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4709. [2022-03-03 19:50:31,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4709 states, 4708 states have (on average 2.5072217502124046) internal successors, (11804), 4708 states have internal predecessors, (11804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4709 states to 4709 states and 11804 transitions. [2022-03-03 19:50:31,214 INFO L78 Accepts]: Start accepts. Automaton has 4709 states and 11804 transitions. Word has length 30 [2022-03-03 19:50:31,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:50:31,214 INFO L470 AbstractCegarLoop]: Abstraction has 4709 states and 11804 transitions. [2022-03-03 19:50:31,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:50:31,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4709 states and 11804 transitions. [2022-03-03 19:50:31,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:50:31,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:50:31,219 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:50:31,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-03 19:50:31,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:31,436 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:50:31,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:50:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash 181205862, now seen corresponding path program 90 times [2022-03-03 19:50:31,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:50:31,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803368445] [2022-03-03 19:50:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:50:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:50:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:50:31,641 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:31,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:50:31,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803368445] [2022-03-03 19:50:31,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803368445] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:50:31,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749086782] [2022-03-03 19:50:31,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:50:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:50:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:50:31,643 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:50:31,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-03 19:50:31,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-03 19:50:31,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:50:31,666 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:50:31,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:50:32,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:32,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:32,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:32,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:50:32,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:50:32,195 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:50:32,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-03 19:50:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:50:32,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:50:33,804 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-03 19:50:33,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-03 19:51:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:22,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749086782] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:22,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:22,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-03 19:51:22,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30234785] [2022-03-03 19:51:22,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:22,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:51:22,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:51:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:51:22,899 INFO L87 Difference]: Start difference. First operand 4709 states and 11804 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:30,572 INFO L93 Difference]: Finished difference Result 9227 states and 22664 transitions. [2022-03-03 19:51:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-03 19:51:30,573 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:51:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:30,585 INFO L225 Difference]: With dead ends: 9227 [2022-03-03 19:51:30,585 INFO L226 Difference]: Without dead ends: 9183 [2022-03-03 19:51:30,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 33 SyntacticMatches, 20 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7482 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=2589, Invalid=15771, Unknown=0, NotChecked=0, Total=18360 [2022-03-03 19:51:30,586 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 400 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 2847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1804 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:30,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 352 Invalid, 2847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 922 Invalid, 0 Unknown, 1804 Unchecked, 0.5s Time] [2022-03-03 19:51:30,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2022-03-03 19:51:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 6044. [2022-03-03 19:51:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6044 states, 6043 states have (on average 2.513983120966407) internal successors, (15192), 6043 states have internal predecessors, (15192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:30,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6044 states to 6044 states and 15192 transitions. [2022-03-03 19:51:30,676 INFO L78 Accepts]: Start accepts. Automaton has 6044 states and 15192 transitions. Word has length 30 [2022-03-03 19:51:30,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:30,676 INFO L470 AbstractCegarLoop]: Abstraction has 6044 states and 15192 transitions. [2022-03-03 19:51:30,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:30,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6044 states and 15192 transitions. [2022-03-03 19:51:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:30,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:30,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:30,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-03 19:51:30,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:30,897 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:51:30,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:30,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1549563870, now seen corresponding path program 91 times [2022-03-03 19:51:30,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:30,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708300526] [2022-03-03 19:51:30,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:30,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:31,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:31,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708300526] [2022-03-03 19:51:31,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708300526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:31,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094133816] [2022-03-03 19:51:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:51:31,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:31,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:31,168 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:31,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-03 19:51:31,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:31,192 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:31,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,512 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:31,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:31,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:51:31,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:31,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:31,945 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:51:31,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:51:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:32,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:51:32,459 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:32,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094133816] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:32,459 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:32,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:51:32,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062345810] [2022-03-03 19:51:32,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:32,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:32,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:32,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:32,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:32,462 INFO L87 Difference]: Start difference. First operand 6044 states and 15192 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:34,785 INFO L93 Difference]: Finished difference Result 7098 states and 17655 transitions. [2022-03-03 19:51:34,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-03 19:51:34,785 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:51:34,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:34,794 INFO L225 Difference]: With dead ends: 7098 [2022-03-03 19:51:34,794 INFO L226 Difference]: Without dead ends: 7052 [2022-03-03 19:51:34,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=931, Invalid=6209, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:51:34,794 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 277 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1572 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:34,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 340 Invalid, 1656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1572 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-03 19:51:34,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7052 states. [2022-03-03 19:51:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7052 to 5783. [2022-03-03 19:51:34,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5783 states, 5782 states have (on average 2.5051885160844) internal successors, (14485), 5782 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:34,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5783 states to 5783 states and 14485 transitions. [2022-03-03 19:51:34,866 INFO L78 Accepts]: Start accepts. Automaton has 5783 states and 14485 transitions. Word has length 30 [2022-03-03 19:51:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:34,866 INFO L470 AbstractCegarLoop]: Abstraction has 5783 states and 14485 transitions. [2022-03-03 19:51:34,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 5783 states and 14485 transitions. [2022-03-03 19:51:34,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:34,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:34,872 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:34,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-03 19:51:35,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:35,087 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:51:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash 846912614, now seen corresponding path program 92 times [2022-03-03 19:51:35,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:35,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661700185] [2022-03-03 19:51:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:35,354 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:35,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:35,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661700185] [2022-03-03 19:51:35,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661700185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:35,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299722320] [2022-03-03 19:51:35,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:51:35,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:35,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:35,356 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:35,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-03 19:51:35,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:51:35,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:35,377 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:51:35,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:35,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:35,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:35,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:35,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:35,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:51:35,774 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:35,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:36,179 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:51:36,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:51:36,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:36,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:51:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:36,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299722320] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:51:36,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:51:36,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:51:36,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174858475] [2022-03-03 19:51:36,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:51:36,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:51:36,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:51:36,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:51:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:51:36,523 INFO L87 Difference]: Start difference. First operand 5783 states and 14485 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:51:38,932 INFO L93 Difference]: Finished difference Result 7282 states and 18026 transitions. [2022-03-03 19:51:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:51:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:51:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:51:38,942 INFO L225 Difference]: With dead ends: 7282 [2022-03-03 19:51:38,942 INFO L226 Difference]: Without dead ends: 7252 [2022-03-03 19:51:38,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=806, Invalid=5674, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:51:38,943 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 246 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:51:38,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 346 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:51:38,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7252 states. [2022-03-03 19:51:39,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7252 to 5867. [2022-03-03 19:51:39,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5867 states, 5866 states have (on average 2.5124445959768154) internal successors, (14738), 5866 states have internal predecessors, (14738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:39,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5867 states to 5867 states and 14738 transitions. [2022-03-03 19:51:39,032 INFO L78 Accepts]: Start accepts. Automaton has 5867 states and 14738 transitions. Word has length 30 [2022-03-03 19:51:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:51:39,033 INFO L470 AbstractCegarLoop]: Abstraction has 5867 states and 14738 transitions. [2022-03-03 19:51:39,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:51:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 5867 states and 14738 transitions. [2022-03-03 19:51:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:51:39,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:51:39,038 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:51:39,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-03-03 19:51:39,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:39,251 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:51:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:51:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 968145010, now seen corresponding path program 93 times [2022-03-03 19:51:39,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:51:39,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996917984] [2022-03-03 19:51:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:51:39,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:51:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:51:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:39,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:51:39,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996917984] [2022-03-03 19:51:39,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996917984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:51:39,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906527682] [2022-03-03 19:51:39,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:51:39,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:51:39,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:51:39,525 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:51:39,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-03 19:51:39,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:51:39,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:51:39,546 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:51:39,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:51:40,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:40,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:40,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:40,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:40,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:51:40,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:40,311 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:51:40,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2022-03-03 19:51:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:51:40,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:51:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:42,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:51:42,590 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-03 19:51:42,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 73 treesize of output 242 [2022-03-03 19:52:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:18,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906527682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:18,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:18,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 39 [2022-03-03 19:52:18,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744379312] [2022-03-03 19:52:18,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:18,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:52:18,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:18,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:52:18,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:52:18,747 INFO L87 Difference]: Start difference. First operand 5867 states and 14738 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:21,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:21,725 INFO L93 Difference]: Finished difference Result 8982 states and 21661 transitions. [2022-03-03 19:52:21,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-03 19:52:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:21,742 INFO L225 Difference]: With dead ends: 8982 [2022-03-03 19:52:21,742 INFO L226 Difference]: Without dead ends: 8935 [2022-03-03 19:52:21,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 42 SyntacticMatches, 8 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=581, Invalid=4249, Unknown=0, NotChecked=0, Total=4830 [2022-03-03 19:52:21,743 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 178 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:21,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 272 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 591 Invalid, 0 Unknown, 660 Unchecked, 0.3s Time] [2022-03-03 19:52:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8935 states. [2022-03-03 19:52:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8935 to 5939. [2022-03-03 19:52:21,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5939 states, 5938 states have (on average 2.506567867969013) internal successors, (14884), 5938 states have internal predecessors, (14884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:21,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5939 states to 5939 states and 14884 transitions. [2022-03-03 19:52:21,818 INFO L78 Accepts]: Start accepts. Automaton has 5939 states and 14884 transitions. Word has length 30 [2022-03-03 19:52:21,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:21,818 INFO L470 AbstractCegarLoop]: Abstraction has 5939 states and 14884 transitions. [2022-03-03 19:52:21,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 39 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:21,818 INFO L276 IsEmpty]: Start isEmpty. Operand 5939 states and 14884 transitions. [2022-03-03 19:52:21,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:21,823 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:21,823 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:21,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:22,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-03 19:52:22,038 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:52:22,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:22,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1672644370, now seen corresponding path program 94 times [2022-03-03 19:52:22,038 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:22,038 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929535780] [2022-03-03 19:52:22,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:22,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:22,318 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929535780] [2022-03-03 19:52:22,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929535780] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:22,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732127654] [2022-03-03 19:52:22,318 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:52:22,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:22,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:22,319 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:22,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-03 19:52:22,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:52:22,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:22,341 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:22,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:22,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:22,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:52:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:22,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:23,065 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:52:23,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:52:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:23,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:23,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:23,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:23,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:52:23,426 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:23,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732127654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:23,426 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:23,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:52:23,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368269987] [2022-03-03 19:52:23,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:23,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:52:23,426 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:23,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:52:23,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:52:23,427 INFO L87 Difference]: Start difference. First operand 5939 states and 14884 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:25,369 INFO L93 Difference]: Finished difference Result 7445 states and 18245 transitions. [2022-03-03 19:52:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:52:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:25,378 INFO L225 Difference]: With dead ends: 7445 [2022-03-03 19:52:25,378 INFO L226 Difference]: Without dead ends: 7397 [2022-03-03 19:52:25,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1747 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=778, Invalid=4772, Unknown=0, NotChecked=0, Total=5550 [2022-03-03 19:52:25,379 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 240 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 921 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:25,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 167 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 921 Invalid, 0 Unknown, 77 Unchecked, 0.5s Time] [2022-03-03 19:52:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7397 states. [2022-03-03 19:52:25,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7397 to 5905. [2022-03-03 19:52:25,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5905 states, 5904 states have (on average 2.504742547425474) internal successors, (14788), 5904 states have internal predecessors, (14788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5905 states to 5905 states and 14788 transitions. [2022-03-03 19:52:25,466 INFO L78 Accepts]: Start accepts. Automaton has 5905 states and 14788 transitions. Word has length 30 [2022-03-03 19:52:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:25,466 INFO L470 AbstractCegarLoop]: Abstraction has 5905 states and 14788 transitions. [2022-03-03 19:52:25,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 5905 states and 14788 transitions. [2022-03-03 19:52:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:25,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:25,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:25,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:25,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-03 19:52:25,676 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:52:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:25,677 INFO L85 PathProgramCache]: Analyzing trace with hash -298602706, now seen corresponding path program 95 times [2022-03-03 19:52:25,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:25,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230346201] [2022-03-03 19:52:25,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:25,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:25,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:25,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230346201] [2022-03-03 19:52:25,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230346201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:25,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732466686] [2022-03-03 19:52:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:52:25,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:25,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:25,937 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:25,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-03 19:52:25,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:52:25,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:25,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:52:25,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:26,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:26,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:26,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:26,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:52:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:26,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:26,771 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:52:26,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-03 19:52:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:27,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:52:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:27,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732466686] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:52:27,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:52:27,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-03 19:52:27,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14089727] [2022-03-03 19:52:27,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:52:27,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:52:27,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:52:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:52:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:52:27,334 INFO L87 Difference]: Start difference. First operand 5905 states and 14788 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:52:29,103 INFO L93 Difference]: Finished difference Result 6938 states and 17086 transitions. [2022-03-03 19:52:29,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-03 19:52:29,104 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:52:29,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:52:29,112 INFO L225 Difference]: With dead ends: 6938 [2022-03-03 19:52:29,113 INFO L226 Difference]: Without dead ends: 6880 [2022-03-03 19:52:29,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 39 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=461, Invalid=3445, Unknown=0, NotChecked=0, Total=3906 [2022-03-03 19:52:29,113 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 242 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1443 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:52:29,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 345 Invalid, 1535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1443 Invalid, 0 Unknown, 45 Unchecked, 0.7s Time] [2022-03-03 19:52:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2022-03-03 19:52:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6284. [2022-03-03 19:52:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6284 states, 6283 states have (on average 2.5102657965939836) internal successors, (15772), 6283 states have internal predecessors, (15772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6284 states to 6284 states and 15772 transitions. [2022-03-03 19:52:29,195 INFO L78 Accepts]: Start accepts. Automaton has 6284 states and 15772 transitions. Word has length 30 [2022-03-03 19:52:29,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:52:29,195 INFO L470 AbstractCegarLoop]: Abstraction has 6284 states and 15772 transitions. [2022-03-03 19:52:29,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:52:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 6284 states and 15772 transitions. [2022-03-03 19:52:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:52:29,201 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:52:29,201 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:52:29,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-03 19:52:29,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-03 19:52:29,410 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:52:29,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:52:29,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1926341354, now seen corresponding path program 96 times [2022-03-03 19:52:29,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:52:29,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865734904] [2022-03-03 19:52:29,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:52:29,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:52:29,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:52:29,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:29,655 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:52:29,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865734904] [2022-03-03 19:52:29,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865734904] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:52:29,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066793148] [2022-03-03 19:52:29,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:52:29,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:52:29,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:52:29,664 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:52:29,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-03 19:52:29,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:52:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:52:29,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:52:29,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:52:30,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:52:30,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:52:30,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:52:30,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2022-03-03 19:52:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:52:30,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:52:32,354 INFO L353 Elim1Store]: treesize reduction 76, result has 73.0 percent of original size [2022-03-03 19:52:32,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 74 treesize of output 231 [2022-03-03 19:53:47,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:47,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066793148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:47,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:47,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-03 19:53:47,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292842575] [2022-03-03 19:53:47,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:47,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:53:47,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:53:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:53:47,370 INFO L87 Difference]: Start difference. First operand 6284 states and 15772 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:54,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:54,293 INFO L93 Difference]: Finished difference Result 10837 states and 26549 transitions. [2022-03-03 19:53:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-03 19:53:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:54,307 INFO L225 Difference]: With dead ends: 10837 [2022-03-03 19:53:54,308 INFO L226 Difference]: Without dead ends: 10791 [2022-03-03 19:53:54,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 36 SyntacticMatches, 27 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 4633 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1554, Invalid=10218, Unknown=0, NotChecked=0, Total=11772 [2022-03-03 19:53:54,308 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 215 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1178 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:54,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 298 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 735 Invalid, 0 Unknown, 1178 Unchecked, 0.4s Time] [2022-03-03 19:53:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10791 states. [2022-03-03 19:53:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10791 to 6996. [2022-03-03 19:53:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6996 states, 6995 states have (on average 2.5122230164403145) internal successors, (17573), 6995 states have internal predecessors, (17573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6996 states to 6996 states and 17573 transitions. [2022-03-03 19:53:54,425 INFO L78 Accepts]: Start accepts. Automaton has 6996 states and 17573 transitions. Word has length 30 [2022-03-03 19:53:54,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:54,425 INFO L470 AbstractCegarLoop]: Abstraction has 6996 states and 17573 transitions. [2022-03-03 19:53:54,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:54,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6996 states and 17573 transitions. [2022-03-03 19:53:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:54,433 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:54,433 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:54,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-03-03 19:53:54,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:54,638 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:53:54,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash 871858922, now seen corresponding path program 97 times [2022-03-03 19:53:54,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:54,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235457373] [2022-03-03 19:53:54,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:54,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:54,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:54,938 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:54,938 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:53:54,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235457373] [2022-03-03 19:53:54,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235457373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:53:54,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917316442] [2022-03-03 19:53:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:53:54,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:53:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:53:54,939 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:53:54,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-03 19:53:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:53:54,975 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:53:54,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:53:55,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:55,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:55,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:53:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:55,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:53:55,800 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:53:55,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:53:56,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:53:56,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:56,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:53:56,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:53:56,237 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:53:56,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917316442] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:53:56,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:53:56,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:53:56,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419170943] [2022-03-03 19:53:56,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:53:56,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:53:56,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:53:56,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:53:56,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=821, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:53:56,238 INFO L87 Difference]: Start difference. First operand 6996 states and 17573 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:53:59,549 INFO L93 Difference]: Finished difference Result 10236 states and 25134 transitions. [2022-03-03 19:53:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-03 19:53:59,549 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:53:59,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:53:59,562 INFO L225 Difference]: With dead ends: 10236 [2022-03-03 19:53:59,562 INFO L226 Difference]: Without dead ends: 10148 [2022-03-03 19:53:59,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1148, Invalid=7972, Unknown=0, NotChecked=0, Total=9120 [2022-03-03 19:53:59,563 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 354 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 1849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:53:59,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 364 Invalid, 1849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1719 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:53:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2022-03-03 19:53:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 6838. [2022-03-03 19:53:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.5066549656281993) internal successors, (17138), 6837 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:59,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 17138 transitions. [2022-03-03 19:53:59,669 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 17138 transitions. Word has length 30 [2022-03-03 19:53:59,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:53:59,669 INFO L470 AbstractCegarLoop]: Abstraction has 6838 states and 17138 transitions. [2022-03-03 19:53:59,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:53:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 17138 transitions. [2022-03-03 19:53:59,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:53:59,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:53:59,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:53:59,692 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-03-03 19:53:59,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-03 19:53:59,892 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:53:59,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:53:59,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1702919190, now seen corresponding path program 98 times [2022-03-03 19:53:59,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:53:59,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631953990] [2022-03-03 19:53:59,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:53:59,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:53:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:54:00,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:00,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631953990] [2022-03-03 19:54:00,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631953990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:00,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464578424] [2022-03-03 19:54:00,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:54:00,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:00,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:00,143 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:00,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-03 19:54:00,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:54:00,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:00,170 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:54:00,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:00,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:54:00,586 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:00,919 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:54:00,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:54:01,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:01,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:54:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:01,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464578424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:54:01,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:54:01,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-03 19:54:01,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129027393] [2022-03-03 19:54:01,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:54:01,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:54:01,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:54:01,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:54:01,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:54:01,409 INFO L87 Difference]: Start difference. First operand 6838 states and 17138 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:54:04,836 INFO L93 Difference]: Finished difference Result 8248 states and 20512 transitions. [2022-03-03 19:54:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:54:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:54:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:54:04,847 INFO L225 Difference]: With dead ends: 8248 [2022-03-03 19:54:04,847 INFO L226 Difference]: Without dead ends: 8172 [2022-03-03 19:54:04,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1929 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=862, Invalid=6448, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:54:04,847 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 216 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 1637 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:54:04,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 296 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1637 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:54:04,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2022-03-03 19:54:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6987. [2022-03-03 19:54:04,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6987 states, 6986 states have (on average 2.5052963068995133) internal successors, (17502), 6986 states have internal predecessors, (17502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:04,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6987 states to 6987 states and 17502 transitions. [2022-03-03 19:54:04,939 INFO L78 Accepts]: Start accepts. Automaton has 6987 states and 17502 transitions. Word has length 30 [2022-03-03 19:54:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:54:04,939 INFO L470 AbstractCegarLoop]: Abstraction has 6987 states and 17502 transitions. [2022-03-03 19:54:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:54:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6987 states and 17502 transitions. [2022-03-03 19:54:04,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:54:04,947 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:54:04,947 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:54:04,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-03 19:54:05,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:05,163 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:54:05,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:54:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1908857622, now seen corresponding path program 99 times [2022-03-03 19:54:05,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:54:05,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549845837] [2022-03-03 19:54:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:54:05,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:54:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:54:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:05,466 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:54:05,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549845837] [2022-03-03 19:54:05,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549845837] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:54:05,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230950575] [2022-03-03 19:54:05,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:54:05,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:54:05,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:54:05,467 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:54:05,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-03 19:54:05,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-03 19:54:05,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:54:05,488 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:54:05,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:54:06,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:54:06,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:06,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:54:06,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2022-03-03 19:54:13,253 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:54:13,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:54:14,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:14,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:54:15,109 INFO L353 Elim1Store]: treesize reduction 44, result has 83.1 percent of original size [2022-03-03 19:54:15,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 74 treesize of output 243 [2022-03-03 19:55:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:09,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230950575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:09,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:09,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 17] total 40 [2022-03-03 19:55:09,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920403544] [2022-03-03 19:55:09,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:09,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-03 19:55:09,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:09,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-03 19:55:09,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1456, Unknown=0, NotChecked=0, Total=1640 [2022-03-03 19:55:09,764 INFO L87 Difference]: Start difference. First operand 6987 states and 17502 transitions. Second operand has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:15,914 INFO L93 Difference]: Finished difference Result 9822 states and 24035 transitions. [2022-03-03 19:55:15,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-03 19:55:15,915 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:15,929 INFO L225 Difference]: With dead ends: 9822 [2022-03-03 19:55:15,929 INFO L226 Difference]: Without dead ends: 9757 [2022-03-03 19:55:15,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 44 SyntacticMatches, 18 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4550 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1648, Invalid=12158, Unknown=0, NotChecked=0, Total=13806 [2022-03-03 19:55:15,931 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 223 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 2486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:15,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 452 Invalid, 2486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1132 Invalid, 0 Unknown, 1254 Unchecked, 0.6s Time] [2022-03-03 19:55:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2022-03-03 19:55:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 7259. [2022-03-03 19:55:16,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7259 states, 7258 states have (on average 2.4977955359603197) internal successors, (18129), 7258 states have internal predecessors, (18129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7259 states to 7259 states and 18129 transitions. [2022-03-03 19:55:16,039 INFO L78 Accepts]: Start accepts. Automaton has 7259 states and 18129 transitions. Word has length 30 [2022-03-03 19:55:16,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:16,040 INFO L470 AbstractCegarLoop]: Abstraction has 7259 states and 18129 transitions. [2022-03-03 19:55:16,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.829268292682927) internal successors, (75), 40 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 7259 states and 18129 transitions. [2022-03-03 19:55:16,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:16,047 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:16,047 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:16,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:16,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-03 19:55:16,251 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:16,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:16,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1519015272, now seen corresponding path program 100 times [2022-03-03 19:55:16,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:16,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917567859] [2022-03-03 19:55:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:16,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:16,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:16,566 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:16,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917567859] [2022-03-03 19:55:16,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917567859] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:16,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843602822] [2022-03-03 19:55:16,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:55:16,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:16,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:16,567 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:16,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-03 19:55:16,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:55:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:16,592 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:16,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:16,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:16,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:16,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:16,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:55:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:17,430 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:55:17,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:55:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:17,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:17,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:17,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:17,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:55:17,894 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:17,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843602822] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:17,894 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:17,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:55:17,894 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804930061] [2022-03-03 19:55:17,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:17,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:55:17,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:17,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:55:17,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:55:17,895 INFO L87 Difference]: Start difference. First operand 7259 states and 18129 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:20,756 INFO L93 Difference]: Finished difference Result 8399 states and 20728 transitions. [2022-03-03 19:55:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:55:20,756 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:20,768 INFO L225 Difference]: With dead ends: 8399 [2022-03-03 19:55:20,768 INFO L226 Difference]: Without dead ends: 8322 [2022-03-03 19:55:20,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1923 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=798, Invalid=6684, Unknown=0, NotChecked=0, Total=7482 [2022-03-03 19:55:20,769 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 223 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1892 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:20,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 350 Invalid, 1966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1892 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-03 19:55:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2022-03-03 19:55:20,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7589. [2022-03-03 19:55:20,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7589 states, 7588 states have (on average 2.4965735371639433) internal successors, (18944), 7588 states have internal predecessors, (18944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7589 states to 7589 states and 18944 transitions. [2022-03-03 19:55:20,910 INFO L78 Accepts]: Start accepts. Automaton has 7589 states and 18944 transitions. Word has length 30 [2022-03-03 19:55:20,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:20,910 INFO L470 AbstractCegarLoop]: Abstraction has 7589 states and 18944 transitions. [2022-03-03 19:55:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 7589 states and 18944 transitions. [2022-03-03 19:55:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:20,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:20,918 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:20,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:21,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:21,124 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:21,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2041359046, now seen corresponding path program 101 times [2022-03-03 19:55:21,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:21,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943258141] [2022-03-03 19:55:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:21,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:21,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:21,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943258141] [2022-03-03 19:55:21,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943258141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:21,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082258922] [2022-03-03 19:55:21,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:55:21,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:21,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:21,420 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:21,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-03 19:55:21,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:55:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:21,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:21,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:21,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:55:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:21,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:22,098 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:55:22,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:55:22,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:22,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:22,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:55:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:22,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082258922] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:22,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:22,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:55:22,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071643352] [2022-03-03 19:55:22,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:22,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:55:22,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:22,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:55:22,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:55:22,517 INFO L87 Difference]: Start difference. First operand 7589 states and 18944 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:24,296 INFO L93 Difference]: Finished difference Result 9687 states and 23583 transitions. [2022-03-03 19:55:24,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-03 19:55:24,296 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:24,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:24,308 INFO L225 Difference]: With dead ends: 9687 [2022-03-03 19:55:24,308 INFO L226 Difference]: Without dead ends: 9645 [2022-03-03 19:55:24,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=561, Invalid=4551, Unknown=0, NotChecked=0, Total=5112 [2022-03-03 19:55:24,309 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 194 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:24,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 240 Invalid, 1603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1138 Invalid, 0 Unknown, 408 Unchecked, 0.5s Time] [2022-03-03 19:55:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9645 states. [2022-03-03 19:55:24,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9645 to 7716. [2022-03-03 19:55:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7716 states, 7715 states have (on average 2.4952689565780948) internal successors, (19251), 7715 states have internal predecessors, (19251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7716 states to 7716 states and 19251 transitions. [2022-03-03 19:55:24,411 INFO L78 Accepts]: Start accepts. Automaton has 7716 states and 19251 transitions. Word has length 30 [2022-03-03 19:55:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:24,411 INFO L470 AbstractCegarLoop]: Abstraction has 7716 states and 19251 transitions. [2022-03-03 19:55:24,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:24,411 INFO L276 IsEmpty]: Start isEmpty. Operand 7716 states and 19251 transitions. [2022-03-03 19:55:24,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:24,419 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:24,419 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:24,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:24,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-03 19:55:24,626 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:24,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:24,626 INFO L85 PathProgramCache]: Analyzing trace with hash -552006922, now seen corresponding path program 102 times [2022-03-03 19:55:24,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:24,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982509783] [2022-03-03 19:55:24,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:24,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:24,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:24,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:24,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982509783] [2022-03-03 19:55:24,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982509783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:24,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135048473] [2022-03-03 19:55:24,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:55:24,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:24,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:24,933 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:24,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-03 19:55:24,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:55:24,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:24,964 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:25,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:55:25,386 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:25,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:25,798 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:55:25,798 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:55:26,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:26,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:26,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:26,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:26,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:55:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:26,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135048473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:26,232 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:26,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:55:26,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40678103] [2022-03-03 19:55:26,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:26,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:55:26,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:55:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:55:26,233 INFO L87 Difference]: Start difference. First operand 7716 states and 19251 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:28,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:28,987 INFO L93 Difference]: Finished difference Result 9343 states and 22828 transitions. [2022-03-03 19:55:28,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-03 19:55:28,987 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:28,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:28,998 INFO L225 Difference]: With dead ends: 9343 [2022-03-03 19:55:28,998 INFO L226 Difference]: Without dead ends: 9253 [2022-03-03 19:55:28,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=756, Invalid=5564, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:55:28,999 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 216 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:28,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 184 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1191 Invalid, 0 Unknown, 256 Unchecked, 0.6s Time] [2022-03-03 19:55:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9253 states. [2022-03-03 19:55:29,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9253 to 7775. [2022-03-03 19:55:29,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7775 states, 7774 states have (on average 2.491381528170826) internal successors, (19368), 7774 states have internal predecessors, (19368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:29,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7775 states to 7775 states and 19368 transitions. [2022-03-03 19:55:29,093 INFO L78 Accepts]: Start accepts. Automaton has 7775 states and 19368 transitions. Word has length 30 [2022-03-03 19:55:29,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:29,094 INFO L470 AbstractCegarLoop]: Abstraction has 7775 states and 19368 transitions. [2022-03-03 19:55:29,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:29,094 INFO L276 IsEmpty]: Start isEmpty. Operand 7775 states and 19368 transitions. [2022-03-03 19:55:29,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:29,102 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:29,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:29,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:29,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:29,317 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:29,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:29,317 INFO L85 PathProgramCache]: Analyzing trace with hash -387775446, now seen corresponding path program 103 times [2022-03-03 19:55:29,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:29,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345748031] [2022-03-03 19:55:29,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:29,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:29,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:55:29,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:29,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345748031] [2022-03-03 19:55:29,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345748031] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:29,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133585668] [2022-03-03 19:55:29,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:55:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:29,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:29,541 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:29,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-03 19:55:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:29,563 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:29,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:29,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:29,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:29,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:29,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:55:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:29,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:30,208 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:55:30,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:55:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:30,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:30,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:55:30,820 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:30,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133585668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:30,820 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:30,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-03 19:55:30,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418590110] [2022-03-03 19:55:30,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:30,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:55:30,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:30,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:55:30,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:55:30,821 INFO L87 Difference]: Start difference. First operand 7775 states and 19368 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:33,846 INFO L93 Difference]: Finished difference Result 9271 states and 22798 transitions. [2022-03-03 19:55:33,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-03 19:55:33,846 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:33,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:33,857 INFO L225 Difference]: With dead ends: 9271 [2022-03-03 19:55:33,857 INFO L226 Difference]: Without dead ends: 9179 [2022-03-03 19:55:33,857 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2104 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1012, Invalid=6128, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:55:33,858 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 296 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1565 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:33,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 346 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1565 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:55:33,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9179 states. [2022-03-03 19:55:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9179 to 8147. [2022-03-03 19:55:33,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8147 states, 8146 states have (on average 2.480726737048858) internal successors, (20208), 8146 states have internal predecessors, (20208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8147 states to 8147 states and 20208 transitions. [2022-03-03 19:55:33,956 INFO L78 Accepts]: Start accepts. Automaton has 8147 states and 20208 transitions. Word has length 30 [2022-03-03 19:55:33,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:33,956 INFO L470 AbstractCegarLoop]: Abstraction has 8147 states and 20208 transitions. [2022-03-03 19:55:33,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:33,956 INFO L276 IsEmpty]: Start isEmpty. Operand 8147 states and 20208 transitions. [2022-03-03 19:55:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:33,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:33,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:33,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:34,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:34,180 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:34,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:34,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1730964982, now seen corresponding path program 104 times [2022-03-03 19:55:34,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:34,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530013183] [2022-03-03 19:55:34,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:34,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:34,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:34,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:34,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530013183] [2022-03-03 19:55:34,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530013183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:34,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576027420] [2022-03-03 19:55:34,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:55:34,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:34,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:34,408 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:34,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:55:34,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:34,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-03 19:55:34,434 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:55:34,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:34,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:34,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:34,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:34,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:34,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:55:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:34,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:35,246 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:55:35,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:55:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,550 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:35,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:35,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:55:35,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:35,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576027420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:55:35,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:55:35,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 12] total 31 [2022-03-03 19:55:35,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719879288] [2022-03-03 19:55:35,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:55:35,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:55:35,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:55:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:55:35,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:55:35,593 INFO L87 Difference]: Start difference. First operand 8147 states and 20208 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:37,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:55:37,915 INFO L93 Difference]: Finished difference Result 9839 states and 23846 transitions. [2022-03-03 19:55:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:55:37,915 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:55:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:55:37,929 INFO L225 Difference]: With dead ends: 9839 [2022-03-03 19:55:37,930 INFO L226 Difference]: Without dead ends: 9794 [2022-03-03 19:55:37,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=658, Invalid=4744, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:55:37,930 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 219 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 410 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:55:37,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 363 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1436 Invalid, 0 Unknown, 410 Unchecked, 0.8s Time] [2022-03-03 19:55:37,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9794 states. [2022-03-03 19:55:38,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9794 to 8058. [2022-03-03 19:55:38,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8058 states, 8057 states have (on average 2.4876504902569194) internal successors, (20043), 8057 states have internal predecessors, (20043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8058 states to 8058 states and 20043 transitions. [2022-03-03 19:55:38,079 INFO L78 Accepts]: Start accepts. Automaton has 8058 states and 20043 transitions. Word has length 30 [2022-03-03 19:55:38,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:55:38,079 INFO L470 AbstractCegarLoop]: Abstraction has 8058 states and 20043 transitions. [2022-03-03 19:55:38,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:55:38,079 INFO L276 IsEmpty]: Start isEmpty. Operand 8058 states and 20043 transitions. [2022-03-03 19:55:38,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:55:38,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:55:38,089 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:55:38,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2022-03-03 19:55:38,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-03-03 19:55:38,303 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:55:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:55:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash -158977306, now seen corresponding path program 105 times [2022-03-03 19:55:38,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:55:38,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719445706] [2022-03-03 19:55:38,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:55:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:55:38,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:55:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:38,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:55:38,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719445706] [2022-03-03 19:55:38,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719445706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:55:38,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721228245] [2022-03-03 19:55:38,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:55:38,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:55:38,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:55:38,579 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:55:38,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-03 19:55:38,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-03 19:55:38,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:55:38,600 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-03 19:55:38,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:55:39,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:39,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:55:39,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:39,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2022-03-03 19:55:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:55:39,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:55:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:39,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:55:40,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:55:40,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 78 treesize of output 223 [2022-03-03 19:56:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:07,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721228245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:07,155 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:07,155 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-03 19:56:07,155 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649258899] [2022-03-03 19:56:07,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:07,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:56:07,155 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:07,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:56:07,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:56:07,156 INFO L87 Difference]: Start difference. First operand 8058 states and 20043 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:11,848 INFO L93 Difference]: Finished difference Result 11602 states and 28388 transitions. [2022-03-03 19:56:11,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-03 19:56:11,849 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:11,867 INFO L225 Difference]: With dead ends: 11602 [2022-03-03 19:56:11,867 INFO L226 Difference]: Without dead ends: 11545 [2022-03-03 19:56:11,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 36 SyntacticMatches, 11 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4469 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1996, Invalid=13010, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 19:56:11,869 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 295 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 2096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1024 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:11,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 420 Invalid, 2096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 971 Invalid, 0 Unknown, 1024 Unchecked, 0.4s Time] [2022-03-03 19:56:11,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11545 states. [2022-03-03 19:56:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11545 to 8002. [2022-03-03 19:56:12,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8002 states, 8001 states have (on average 2.4905636795400574) internal successors, (19927), 8001 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 19927 transitions. [2022-03-03 19:56:12,033 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 19927 transitions. Word has length 30 [2022-03-03 19:56:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:12,034 INFO L470 AbstractCegarLoop]: Abstraction has 8002 states and 19927 transitions. [2022-03-03 19:56:12,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 19927 transitions. [2022-03-03 19:56:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:12,043 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:12,044 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:12,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2022-03-03 19:56:12,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:12,247 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:12,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:12,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1739359666, now seen corresponding path program 106 times [2022-03-03 19:56:12,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:12,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965507363] [2022-03-03 19:56:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:12,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:12,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965507363] [2022-03-03 19:56:12,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965507363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:12,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505431113] [2022-03-03 19:56:12,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:56:12,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:12,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:12,496 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:12,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-03 19:56:12,520 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:56:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:12,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:56:12,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:12,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:56:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:12,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:13,123 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:56:13,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 40 treesize of output 165 [2022-03-03 19:56:13,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:13,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:13,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:56:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:13,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505431113] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:13,493 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:13,493 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 28 [2022-03-03 19:56:13,493 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294795024] [2022-03-03 19:56:13,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:13,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-03 19:56:13,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:13,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-03 19:56:13,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-03 19:56:13,494 INFO L87 Difference]: Start difference. First operand 8002 states and 19927 transitions. Second operand has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:15,424 INFO L93 Difference]: Finished difference Result 8930 states and 22016 transitions. [2022-03-03 19:56:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-03 19:56:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:15,437 INFO L225 Difference]: With dead ends: 8930 [2022-03-03 19:56:15,437 INFO L226 Difference]: Without dead ends: 8896 [2022-03-03 19:56:15,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 38 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=494, Invalid=3666, Unknown=0, NotChecked=0, Total=4160 [2022-03-03 19:56:15,438 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 255 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 1689 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:15,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 390 Invalid, 1840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1689 Invalid, 0 Unknown, 107 Unchecked, 0.8s Time] [2022-03-03 19:56:15,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8896 states. [2022-03-03 19:56:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8896 to 8392. [2022-03-03 19:56:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8392 states, 8391 states have (on average 2.505780002383506) internal successors, (21026), 8391 states have internal predecessors, (21026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8392 states to 8392 states and 21026 transitions. [2022-03-03 19:56:15,549 INFO L78 Accepts]: Start accepts. Automaton has 8392 states and 21026 transitions. Word has length 30 [2022-03-03 19:56:15,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:15,549 INFO L470 AbstractCegarLoop]: Abstraction has 8392 states and 21026 transitions. [2022-03-03 19:56:15,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4827586206896552) internal successors, (72), 28 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:15,549 INFO L276 IsEmpty]: Start isEmpty. Operand 8392 states and 21026 transitions. [2022-03-03 19:56:15,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:15,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:15,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:15,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:15,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:15,774 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:15,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:15,774 INFO L85 PathProgramCache]: Analyzing trace with hash 335043182, now seen corresponding path program 107 times [2022-03-03 19:56:15,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:15,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384991604] [2022-03-03 19:56:15,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:15,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:15,982 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:15,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384991604] [2022-03-03 19:56:15,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384991604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:15,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809956891] [2022-03-03 19:56:15,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:56:15,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:15,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:15,984 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:15,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-03 19:56:16,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-03 19:56:16,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:16,006 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:56:16,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:16,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:16,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:16,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:56:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:16,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:16,810 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:56:16,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:56:17,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:17,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:17,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:17,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:17,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:56:17,376 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:17,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809956891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:56:17,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:56:17,377 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 29 [2022-03-03 19:56:17,377 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095264534] [2022-03-03 19:56:17,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:56:17,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:56:17,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:56:17,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:56:17,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:56:17,377 INFO L87 Difference]: Start difference. First operand 8392 states and 21026 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:56:20,549 INFO L93 Difference]: Finished difference Result 9626 states and 23879 transitions. [2022-03-03 19:56:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:56:20,549 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:56:20,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:56:20,563 INFO L225 Difference]: With dead ends: 9626 [2022-03-03 19:56:20,563 INFO L226 Difference]: Without dead ends: 9520 [2022-03-03 19:56:20,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=912, Invalid=6228, Unknown=0, NotChecked=0, Total=7140 [2022-03-03 19:56:20,564 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 355 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1591 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:56:20,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 419 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1591 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:56:20,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9520 states. [2022-03-03 19:56:20,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9520 to 8462. [2022-03-03 19:56:20,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8462 states, 8461 states have (on average 2.5004136626876257) internal successors, (21156), 8461 states have internal predecessors, (21156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:20,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8462 states to 8462 states and 21156 transitions. [2022-03-03 19:56:20,681 INFO L78 Accepts]: Start accepts. Automaton has 8462 states and 21156 transitions. Word has length 30 [2022-03-03 19:56:20,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:56:20,681 INFO L470 AbstractCegarLoop]: Abstraction has 8462 states and 21156 transitions. [2022-03-03 19:56:20,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:56:20,681 INFO L276 IsEmpty]: Start isEmpty. Operand 8462 states and 21156 transitions. [2022-03-03 19:56:20,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:56:20,690 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:56:20,690 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:56:20,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-03 19:56:20,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:20,892 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:56:20,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:56:20,892 INFO L85 PathProgramCache]: Analyzing trace with hash 129104750, now seen corresponding path program 108 times [2022-03-03 19:56:20,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:56:20,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879434208] [2022-03-03 19:56:20,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:56:20,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:56:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:56:21,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:56:21,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:56:21,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879434208] [2022-03-03 19:56:21,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879434208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:56:21,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580533456] [2022-03-03 19:56:21,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:56:21,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:56:21,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:56:21,110 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:56:21,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-03 19:56:21,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:56:21,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:56:21,132 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-03 19:56:21,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:56:23,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:56:23,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:23,146 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:23,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 73 treesize of output 173 [2022-03-03 19:56:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:56:23,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:56:24,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:56:24,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:56:24,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 74 treesize of output 243 [2022-03-03 19:57:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:44,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580533456] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:44,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:44,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 39 [2022-03-03 19:57:44,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102378947] [2022-03-03 19:57:44,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:44,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-03 19:57:44,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-03 19:57:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1380, Unknown=0, NotChecked=0, Total=1560 [2022-03-03 19:57:44,937 INFO L87 Difference]: Start difference. First operand 8462 states and 21156 transitions. Second operand has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:49,967 INFO L93 Difference]: Finished difference Result 12357 states and 30466 transitions. [2022-03-03 19:57:49,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-03 19:57:49,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:49,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:49,989 INFO L225 Difference]: With dead ends: 12357 [2022-03-03 19:57:49,989 INFO L226 Difference]: Without dead ends: 12313 [2022-03-03 19:57:49,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 35 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2308 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1283, Invalid=7089, Unknown=0, NotChecked=0, Total=8372 [2022-03-03 19:57:49,990 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 249 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 1776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 963 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:49,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 280 Invalid, 1776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 726 Invalid, 0 Unknown, 963 Unchecked, 0.4s Time] [2022-03-03 19:57:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12313 states. [2022-03-03 19:57:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12313 to 8580. [2022-03-03 19:57:50,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8580 states, 8579 states have (on average 2.4991257722345264) internal successors, (21440), 8579 states have internal predecessors, (21440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8580 states to 8580 states and 21440 transitions. [2022-03-03 19:57:50,150 INFO L78 Accepts]: Start accepts. Automaton has 8580 states and 21440 transitions. Word has length 30 [2022-03-03 19:57:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:50,151 INFO L470 AbstractCegarLoop]: Abstraction has 8580 states and 21440 transitions. [2022-03-03 19:57:50,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.875) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 8580 states and 21440 transitions. [2022-03-03 19:57:50,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:50,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:50,161 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:50,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:50,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-03-03 19:57:50,367 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:50,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1938423176, now seen corresponding path program 109 times [2022-03-03 19:57:50,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:50,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52271680] [2022-03-03 19:57:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:50,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:50,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:50,719 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:57:50,720 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:50,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52271680] [2022-03-03 19:57:50,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52271680] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:50,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239607071] [2022-03-03 19:57:50,720 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:57:50,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:50,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:50,721 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:50,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-03 19:57:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:50,750 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:57:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:57:51,102 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:51,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:51,445 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:57:51,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:57:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:51,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:57:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:51,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239607071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:51,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:51,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:57:51,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787215988] [2022-03-03 19:57:51,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:51,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:51,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:51,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:51,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:51,899 INFO L87 Difference]: Start difference. First operand 8580 states and 21440 transitions. Second operand has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:54,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:54,429 INFO L93 Difference]: Finished difference Result 11014 states and 27023 transitions. [2022-03-03 19:57:54,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:57:54,429 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:54,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:54,444 INFO L225 Difference]: With dead ends: 11014 [2022-03-03 19:57:54,444 INFO L226 Difference]: Without dead ends: 10936 [2022-03-03 19:57:54,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=668, Invalid=4588, Unknown=0, NotChecked=0, Total=5256 [2022-03-03 19:57:54,445 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 190 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:54,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 334 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-03 19:57:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10936 states. [2022-03-03 19:57:54,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10936 to 8750. [2022-03-03 19:57:54,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8750 states, 8749 states have (on average 2.4878271802491714) internal successors, (21766), 8749 states have internal predecessors, (21766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8750 states to 8750 states and 21766 transitions. [2022-03-03 19:57:54,560 INFO L78 Accepts]: Start accepts. Automaton has 8750 states and 21766 transitions. Word has length 30 [2022-03-03 19:57:54,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:54,561 INFO L470 AbstractCegarLoop]: Abstraction has 8750 states and 21766 transitions. [2022-03-03 19:57:54,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.3225806451612905) internal successors, (72), 30 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 8750 states and 21766 transitions. [2022-03-03 19:57:54,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-03 19:57:54,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:54,570 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:54,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:54,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-03 19:57:54,776 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:54,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:54,777 INFO L85 PathProgramCache]: Analyzing trace with hash -209232786, now seen corresponding path program 110 times [2022-03-03 19:57:54,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:54,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261351323] [2022-03-03 19:57:54,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:54,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:54,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:55,097 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:55,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261351323] [2022-03-03 19:57:55,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261351323] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:55,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80535863] [2022-03-03 19:57:55,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:57:55,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:55,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:55,099 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:55,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-03 19:57:55,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:57:55,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:55,130 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-03 19:57:55,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:55,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:55,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:55,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2022-03-03 19:57:55,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:55,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:55,781 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-03 19:57:55,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 41 treesize of output 166 [2022-03-03 19:57:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:57:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:56,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:57:56,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 3 [2022-03-03 19:57:56,344 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:56,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80535863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:56,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:56,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 30 [2022-03-03 19:57:56,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051934236] [2022-03-03 19:57:56,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:56,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:56,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:56,345 INFO L87 Difference]: Start difference. First operand 8750 states and 21766 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:57:58,995 INFO L93 Difference]: Finished difference Result 9575 states and 23667 transitions. [2022-03-03 19:57:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:57:58,995 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-03 19:57:58,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:57:59,009 INFO L225 Difference]: With dead ends: 9575 [2022-03-03 19:57:59,010 INFO L226 Difference]: Without dead ends: 9555 [2022-03-03 19:57:59,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=740, Invalid=5422, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:57:59,010 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 252 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:57:59,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 246 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-03 19:57:59,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9555 states. [2022-03-03 19:57:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9555 to 8976. [2022-03-03 19:57:59,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8976 states, 8975 states have (on average 2.4892479108635097) internal successors, (22341), 8975 states have internal predecessors, (22341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:59,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8976 states to 8976 states and 22341 transitions. [2022-03-03 19:57:59,134 INFO L78 Accepts]: Start accepts. Automaton has 8976 states and 22341 transitions. Word has length 30 [2022-03-03 19:57:59,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:57:59,134 INFO L470 AbstractCegarLoop]: Abstraction has 8976 states and 22341 transitions. [2022-03-03 19:57:59,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:57:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand 8976 states and 22341 transitions. [2022-03-03 19:57:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:57:59,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:57:59,145 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:57:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2022-03-03 19:57:59,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-03 19:57:59,361 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:57:59,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:57:59,362 INFO L85 PathProgramCache]: Analyzing trace with hash -300802278, now seen corresponding path program 111 times [2022-03-03 19:57:59,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:57:59,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747181049] [2022-03-03 19:57:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:57:59,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:57:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:57:59,441 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:57:59,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747181049] [2022-03-03 19:57:59,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747181049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:57:59,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684903018] [2022-03-03 19:57:59,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:57:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:57:59,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:57:59,443 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:57:59,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-03 19:57:59,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:57:59,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:57:59,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:57:59,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:57:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:57:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:57:59,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684903018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:57:59,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:57:59,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-03-03 19:57:59,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949043168] [2022-03-03 19:57:59,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:57:59,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:57:59,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:57:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:57:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:57:59,747 INFO L87 Difference]: Start difference. First operand 8976 states and 22341 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:00,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:00,914 INFO L93 Difference]: Finished difference Result 10585 states and 25843 transitions. [2022-03-03 19:58:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-03 19:58:00,914 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:00,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:00,934 INFO L225 Difference]: With dead ends: 10585 [2022-03-03 19:58:00,934 INFO L226 Difference]: Without dead ends: 10585 [2022-03-03 19:58:00,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2399 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2144, Invalid=6412, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:58:00,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 284 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:00,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 178 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10585 states. [2022-03-03 19:58:01,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10585 to 7908. [2022-03-03 19:58:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7908 states, 7907 states have (on average 2.48197799418237) internal successors, (19625), 7907 states have internal predecessors, (19625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7908 states to 7908 states and 19625 transitions. [2022-03-03 19:58:01,082 INFO L78 Accepts]: Start accepts. Automaton has 7908 states and 19625 transitions. Word has length 32 [2022-03-03 19:58:01,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:01,082 INFO L470 AbstractCegarLoop]: Abstraction has 7908 states and 19625 transitions. [2022-03-03 19:58:01,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:01,082 INFO L276 IsEmpty]: Start isEmpty. Operand 7908 states and 19625 transitions. [2022-03-03 19:58:01,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:01,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:01,092 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:01,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:01,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-03 19:58:01,309 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:01,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:01,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1150918110, now seen corresponding path program 112 times [2022-03-03 19:58:01,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:01,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593251206] [2022-03-03 19:58:01,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:01,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:01,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593251206] [2022-03-03 19:58:01,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593251206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:01,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571008972] [2022-03-03 19:58:01,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:01,406 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:01,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-03 19:58:01,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:01,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:01,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:01,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:01,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:01,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:01,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571008972] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:01,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:01,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-03 19:58:01,808 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562993242] [2022-03-03 19:58:01,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:01,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:01,808 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:01,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:01,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=662, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:01,808 INFO L87 Difference]: Start difference. First operand 7908 states and 19625 transitions. Second operand has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:03,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:03,371 INFO L93 Difference]: Finished difference Result 11962 states and 29058 transitions. [2022-03-03 19:58:03,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-03 19:58:03,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:03,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:03,392 INFO L225 Difference]: With dead ends: 11962 [2022-03-03 19:58:03,392 INFO L226 Difference]: Without dead ends: 11858 [2022-03-03 19:58:03,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2122, Invalid=6434, Unknown=0, NotChecked=0, Total=8556 [2022-03-03 19:58:03,393 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 617 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 617 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:03,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [617 Valid, 189 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11858 states. [2022-03-03 19:58:03,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11858 to 8382. [2022-03-03 19:58:03,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8382 states, 8381 states have (on average 2.4921847034960027) internal successors, (20887), 8381 states have internal predecessors, (20887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 20887 transitions. [2022-03-03 19:58:03,564 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 20887 transitions. Word has length 32 [2022-03-03 19:58:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 8382 states and 20887 transitions. [2022-03-03 19:58:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2) internal successors, (66), 29 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 20887 transitions. [2022-03-03 19:58:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:03,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:03,575 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:03,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-03 19:58:03,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:03,775 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1474861086, now seen corresponding path program 113 times [2022-03-03 19:58:03,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:03,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065773604] [2022-03-03 19:58:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:03,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:03,855 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065773604] [2022-03-03 19:58:03,855 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065773604] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:03,855 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255452684] [2022-03-03 19:58:03,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:03,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:03,856 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:03,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-03 19:58:03,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:58:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:03,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:04,088 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:04,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:04,301 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:04,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255452684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:04,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:04,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 30 [2022-03-03 19:58:04,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113075926] [2022-03-03 19:58:04,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:04,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:58:04,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:04,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:58:04,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:04,302 INFO L87 Difference]: Start difference. First operand 8382 states and 20887 transitions. Second operand has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:05,772 INFO L93 Difference]: Finished difference Result 14128 states and 34642 transitions. [2022-03-03 19:58:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-03 19:58:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:05,801 INFO L225 Difference]: With dead ends: 14128 [2022-03-03 19:58:05,801 INFO L226 Difference]: Without dead ends: 14116 [2022-03-03 19:58:05,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5451 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3893, Invalid=10149, Unknown=0, NotChecked=0, Total=14042 [2022-03-03 19:58:05,803 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 498 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:05,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 244 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:05,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14116 states. [2022-03-03 19:58:06,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14116 to 10452. [2022-03-03 19:58:06,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10452 states, 10451 states have (on average 2.5024399578987655) internal successors, (26153), 10451 states have internal predecessors, (26153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:06,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10452 states to 10452 states and 26153 transitions. [2022-03-03 19:58:06,081 INFO L78 Accepts]: Start accepts. Automaton has 10452 states and 26153 transitions. Word has length 32 [2022-03-03 19:58:06,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:06,081 INFO L470 AbstractCegarLoop]: Abstraction has 10452 states and 26153 transitions. [2022-03-03 19:58:06,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4193548387096775) internal successors, (75), 30 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:06,081 INFO L276 IsEmpty]: Start isEmpty. Operand 10452 states and 26153 transitions. [2022-03-03 19:58:06,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:06,093 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:06,093 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:06,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:06,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:06,310 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:06,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:06,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1806539874, now seen corresponding path program 114 times [2022-03-03 19:58:06,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:06,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235440174] [2022-03-03 19:58:06,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:06,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:06,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:06,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:06,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:06,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235440174] [2022-03-03 19:58:06,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235440174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:06,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256573415] [2022-03-03 19:58:06,372 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:06,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:06,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:06,373 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:06,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-03 19:58:06,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-03 19:58:06,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:06,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:06,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:06,652 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:06,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:06,844 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:06,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256573415] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:06,844 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:06,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-03 19:58:06,844 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038412506] [2022-03-03 19:58:06,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:06,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:06,844 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:06,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:06,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:06,845 INFO L87 Difference]: Start difference. First operand 10452 states and 26153 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:07,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:07,904 INFO L93 Difference]: Finished difference Result 10899 states and 27011 transitions. [2022-03-03 19:58:07,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-03 19:58:07,905 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:07,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:07,922 INFO L225 Difference]: With dead ends: 10899 [2022-03-03 19:58:07,922 INFO L226 Difference]: Without dead ends: 10895 [2022-03-03 19:58:07,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1634, Invalid=4218, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:58:07,923 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 256 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 90 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10895 states. [2022-03-03 19:58:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10895 to 10388. [2022-03-03 19:58:08,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10388 states, 10387 states have (on average 2.502743814383364) internal successors, (25996), 10387 states have internal predecessors, (25996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10388 states to 10388 states and 25996 transitions. [2022-03-03 19:58:08,098 INFO L78 Accepts]: Start accepts. Automaton has 10388 states and 25996 transitions. Word has length 32 [2022-03-03 19:58:08,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:08,098 INFO L470 AbstractCegarLoop]: Abstraction has 10388 states and 25996 transitions. [2022-03-03 19:58:08,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:08,098 INFO L276 IsEmpty]: Start isEmpty. Operand 10388 states and 25996 transitions. [2022-03-03 19:58:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:08,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:08,109 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:08,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:08,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-03 19:58:08,326 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 2054156772, now seen corresponding path program 115 times [2022-03-03 19:58:08,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:08,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732986440] [2022-03-03 19:58:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:08,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:08,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:08,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:08,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732986440] [2022-03-03 19:58:08,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732986440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:08,402 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548573789] [2022-03-03 19:58:08,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:08,403 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:08,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-03 19:58:08,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:08,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:08,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548573789] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:08,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:08,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-03 19:58:08,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22925205] [2022-03-03 19:58:08,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:08,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:08,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:08,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:08,860 INFO L87 Difference]: Start difference. First operand 10388 states and 25996 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:09,833 INFO L93 Difference]: Finished difference Result 13056 states and 32403 transitions. [2022-03-03 19:58:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-03 19:58:09,833 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:09,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:09,855 INFO L225 Difference]: With dead ends: 13056 [2022-03-03 19:58:09,855 INFO L226 Difference]: Without dead ends: 13041 [2022-03-03 19:58:09,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1592, Invalid=4260, Unknown=0, NotChecked=0, Total=5852 [2022-03-03 19:58:09,856 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 441 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:09,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 132 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:09,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13041 states. [2022-03-03 19:58:10,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13041 to 10636. [2022-03-03 19:58:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10636 states, 10635 states have (on average 2.510766337564645) internal successors, (26702), 10635 states have internal predecessors, (26702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:10,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10636 states to 10636 states and 26702 transitions. [2022-03-03 19:58:10,096 INFO L78 Accepts]: Start accepts. Automaton has 10636 states and 26702 transitions. Word has length 32 [2022-03-03 19:58:10,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:10,096 INFO L470 AbstractCegarLoop]: Abstraction has 10636 states and 26702 transitions. [2022-03-03 19:58:10,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 29 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:10,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10636 states and 26702 transitions. [2022-03-03 19:58:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:10,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:10,106 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:10,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:10,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:10,315 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:10,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1796277502, now seen corresponding path program 116 times [2022-03-03 19:58:10,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:10,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790451938] [2022-03-03 19:58:10,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:10,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:10,372 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,372 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:10,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790451938] [2022-03-03 19:58:10,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790451938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:10,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552085342] [2022-03-03 19:58:10,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:10,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:10,374 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:10,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-03 19:58:10,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:10,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:10,561 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:10,684 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:10,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552085342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:10,684 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:10,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-03 19:58:10,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265187927] [2022-03-03 19:58:10,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:10,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:10,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:10,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:10,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:10,685 INFO L87 Difference]: Start difference. First operand 10636 states and 26702 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:11,484 INFO L93 Difference]: Finished difference Result 11860 states and 29329 transitions. [2022-03-03 19:58:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:58:11,485 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:11,505 INFO L225 Difference]: With dead ends: 11860 [2022-03-03 19:58:11,505 INFO L226 Difference]: Without dead ends: 11844 [2022-03-03 19:58:11,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1639, Invalid=4367, Unknown=0, NotChecked=0, Total=6006 [2022-03-03 19:58:11,506 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 249 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:11,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 151 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11844 states. [2022-03-03 19:58:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11844 to 10828. [2022-03-03 19:58:11,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10828 states, 10827 states have (on average 2.5161171146208554) internal successors, (27242), 10827 states have internal predecessors, (27242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10828 states to 10828 states and 27242 transitions. [2022-03-03 19:58:11,704 INFO L78 Accepts]: Start accepts. Automaton has 10828 states and 27242 transitions. Word has length 32 [2022-03-03 19:58:11,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:11,704 INFO L470 AbstractCegarLoop]: Abstraction has 10828 states and 27242 transitions. [2022-03-03 19:58:11,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:11,704 INFO L276 IsEmpty]: Start isEmpty. Operand 10828 states and 27242 transitions. [2022-03-03 19:58:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:11,715 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:11,715 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:11,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:11,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:11,936 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:11,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:11,936 INFO L85 PathProgramCache]: Analyzing trace with hash -484301822, now seen corresponding path program 117 times [2022-03-03 19:58:11,936 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:11,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089616052] [2022-03-03 19:58:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:12,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089616052] [2022-03-03 19:58:12,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089616052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:12,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811025403] [2022-03-03 19:58:12,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:12,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:12,030 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:12,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-03 19:58:12,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-03 19:58:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:12,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:12,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811025403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:12,461 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:12,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-03 19:58:12,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653049806] [2022-03-03 19:58:12,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:12,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:12,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:12,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:12,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:12,462 INFO L87 Difference]: Start difference. First operand 10828 states and 27242 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:13,563 INFO L93 Difference]: Finished difference Result 12409 states and 30669 transitions. [2022-03-03 19:58:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-03 19:58:13,564 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:13,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:13,589 INFO L225 Difference]: With dead ends: 12409 [2022-03-03 19:58:13,589 INFO L226 Difference]: Without dead ends: 12383 [2022-03-03 19:58:13,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1652, Invalid=4510, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:58:13,590 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 273 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:13,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 175 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:13,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12383 states. [2022-03-03 19:58:13,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12383 to 10973. [2022-03-03 19:58:13,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10973 states, 10972 states have (on average 2.5203244622675904) internal successors, (27653), 10972 states have internal predecessors, (27653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:13,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10973 states to 10973 states and 27653 transitions. [2022-03-03 19:58:13,771 INFO L78 Accepts]: Start accepts. Automaton has 10973 states and 27653 transitions. Word has length 32 [2022-03-03 19:58:13,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:13,771 INFO L470 AbstractCegarLoop]: Abstraction has 10973 states and 27653 transitions. [2022-03-03 19:58:13,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:13,771 INFO L276 IsEmpty]: Start isEmpty. Operand 10973 states and 27653 transitions. [2022-03-03 19:58:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:13,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:13,809 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:13,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:14,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-03 19:58:14,019 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:14,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1898908930, now seen corresponding path program 118 times [2022-03-03 19:58:14,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:14,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594318429] [2022-03-03 19:58:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:14,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:14,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:14,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594318429] [2022-03-03 19:58:14,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594318429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:14,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486773766] [2022-03-03 19:58:14,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:14,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:14,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:14,078 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:14,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-03 19:58:14,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:14,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:14,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:14,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:14,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:14,401 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:14,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486773766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:14,401 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:14,401 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-03 19:58:14,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264751042] [2022-03-03 19:58:14,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:14,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:14,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:14,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:14,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:14,402 INFO L87 Difference]: Start difference. First operand 10973 states and 27653 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:15,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:15,161 INFO L93 Difference]: Finished difference Result 12772 states and 31586 transitions. [2022-03-03 19:58:15,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-03 19:58:15,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:15,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:15,184 INFO L225 Difference]: With dead ends: 12772 [2022-03-03 19:58:15,184 INFO L226 Difference]: Without dead ends: 12742 [2022-03-03 19:58:15,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1673, Invalid=4647, Unknown=0, NotChecked=0, Total=6320 [2022-03-03 19:58:15,185 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 364 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:15,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 136 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2022-03-03 19:58:15,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 9625. [2022-03-03 19:58:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9625 states, 9624 states have (on average 2.511118038237739) internal successors, (24167), 9624 states have internal predecessors, (24167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:15,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9625 states to 9625 states and 24167 transitions. [2022-03-03 19:58:15,373 INFO L78 Accepts]: Start accepts. Automaton has 9625 states and 24167 transitions. Word has length 32 [2022-03-03 19:58:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:15,373 INFO L470 AbstractCegarLoop]: Abstraction has 9625 states and 24167 transitions. [2022-03-03 19:58:15,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:15,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9625 states and 24167 transitions. [2022-03-03 19:58:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:15,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:15,383 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:15,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:15,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-03 19:58:15,600 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:15,600 INFO L85 PathProgramCache]: Analyzing trace with hash 384942132, now seen corresponding path program 119 times [2022-03-03 19:58:15,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:15,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158024303] [2022-03-03 19:58:15,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:15,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:15,671 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:15,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:15,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158024303] [2022-03-03 19:58:15,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158024303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:15,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542092027] [2022-03-03 19:58:15,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:15,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:15,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:15,673 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:15,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-03 19:58:15,698 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-03 19:58:15,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:15,893 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:15,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:16,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:16,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542092027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:16,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:16,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 32 [2022-03-03 19:58:16,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108485898] [2022-03-03 19:58:16,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:16,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-03 19:58:16,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:16,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-03 19:58:16,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2022-03-03 19:58:16,137 INFO L87 Difference]: Start difference. First operand 9625 states and 24167 transitions. Second operand has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:17,742 INFO L93 Difference]: Finished difference Result 11567 states and 28032 transitions. [2022-03-03 19:58:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-03 19:58:17,743 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:17,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:17,757 INFO L225 Difference]: With dead ends: 11567 [2022-03-03 19:58:17,757 INFO L226 Difference]: Without dead ends: 11567 [2022-03-03 19:58:17,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2368, Invalid=6944, Unknown=0, NotChecked=0, Total=9312 [2022-03-03 19:58:17,759 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 364 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:17,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 251 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:17,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11567 states. [2022-03-03 19:58:17,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11567 to 9011. [2022-03-03 19:58:17,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9011 states, 9010 states have (on average 2.4963374028856826) internal successors, (22492), 9010 states have internal predecessors, (22492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9011 states to 9011 states and 22492 transitions. [2022-03-03 19:58:17,888 INFO L78 Accepts]: Start accepts. Automaton has 9011 states and 22492 transitions. Word has length 32 [2022-03-03 19:58:17,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:17,888 INFO L470 AbstractCegarLoop]: Abstraction has 9011 states and 22492 transitions. [2022-03-03 19:58:17,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 9011 states and 22492 transitions. [2022-03-03 19:58:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:17,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:17,896 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:17,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:18,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-03 19:58:18,101 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:18,101 INFO L85 PathProgramCache]: Analyzing trace with hash -1781805508, now seen corresponding path program 120 times [2022-03-03 19:58:18,102 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:18,102 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809102654] [2022-03-03 19:58:18,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:18,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:18,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:18,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809102654] [2022-03-03 19:58:18,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809102654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:18,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947123566] [2022-03-03 19:58:18,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:18,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:18,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:18,195 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:18,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-03 19:58:18,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-03 19:58:18,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:18,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:18,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:18,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:18,477 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:18,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947123566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:18,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:18,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-03 19:58:18,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454920962] [2022-03-03 19:58:18,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:18,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:18,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:18,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:18,478 INFO L87 Difference]: Start difference. First operand 9011 states and 22492 transitions. Second operand has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:19,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:19,484 INFO L93 Difference]: Finished difference Result 10374 states and 25301 transitions. [2022-03-03 19:58:19,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:58:19,484 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:19,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:19,497 INFO L225 Difference]: With dead ends: 10374 [2022-03-03 19:58:19,497 INFO L226 Difference]: Without dead ends: 10308 [2022-03-03 19:58:19,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2022-03-03 19:58:19,498 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 404 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:19,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 159 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:19,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2022-03-03 19:58:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 9005. [2022-03-03 19:58:19,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9005 states, 9004 states have (on average 2.4955575299866726) internal successors, (22470), 9004 states have internal predecessors, (22470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9005 states to 9005 states and 22470 transitions. [2022-03-03 19:58:19,621 INFO L78 Accepts]: Start accepts. Automaton has 9005 states and 22470 transitions. Word has length 32 [2022-03-03 19:58:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:19,621 INFO L470 AbstractCegarLoop]: Abstraction has 9005 states and 22470 transitions. [2022-03-03 19:58:19,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:19,621 INFO L276 IsEmpty]: Start isEmpty. Operand 9005 states and 22470 transitions. [2022-03-03 19:58:19,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:19,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:19,629 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:19,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:19,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-03 19:58:19,832 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:19,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:19,832 INFO L85 PathProgramCache]: Analyzing trace with hash -745683916, now seen corresponding path program 121 times [2022-03-03 19:58:19,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:19,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374906374] [2022-03-03 19:58:19,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:19,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:19,916 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:19,916 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:19,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374906374] [2022-03-03 19:58:19,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374906374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:19,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792730678] [2022-03-03 19:58:19,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:19,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:19,917 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:19,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-03 19:58:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:19,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:19,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:20,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:20,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792730678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:20,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:20,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2022-03-03 19:58:20,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192588801] [2022-03-03 19:58:20,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-03 19:58:20,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-03 19:58:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2022-03-03 19:58:20,333 INFO L87 Difference]: Start difference. First operand 9005 states and 22470 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:21,792 INFO L93 Difference]: Finished difference Result 11342 states and 27377 transitions. [2022-03-03 19:58:21,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-03 19:58:21,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:21,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:21,808 INFO L225 Difference]: With dead ends: 11342 [2022-03-03 19:58:21,808 INFO L226 Difference]: Without dead ends: 11342 [2022-03-03 19:58:21,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3866 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2919, Invalid=7793, Unknown=0, NotChecked=0, Total=10712 [2022-03-03 19:58:21,809 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 426 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:21,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 285 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11342 states. [2022-03-03 19:58:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11342 to 8307. [2022-03-03 19:58:21,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8307 states, 8306 states have (on average 2.4753190464724297) internal successors, (20560), 8306 states have internal predecessors, (20560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8307 states to 8307 states and 20560 transitions. [2022-03-03 19:58:21,960 INFO L78 Accepts]: Start accepts. Automaton has 8307 states and 20560 transitions. Word has length 32 [2022-03-03 19:58:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:21,960 INFO L470 AbstractCegarLoop]: Abstraction has 8307 states and 20560 transitions. [2022-03-03 19:58:21,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 8307 states and 20560 transitions. [2022-03-03 19:58:21,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:21,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:21,968 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:21,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:22,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,172 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:22,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1530812424, now seen corresponding path program 122 times [2022-03-03 19:58:22,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:22,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264479103] [2022-03-03 19:58:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:22,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:22,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:22,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264479103] [2022-03-03 19:58:22,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264479103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:22,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187901067] [2022-03-03 19:58:22,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:22,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:22,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:22,257 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:22,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-03 19:58:22,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:22,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:22,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:22,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:22,537 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:22,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187901067] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:22,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:22,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-03 19:58:22,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874417247] [2022-03-03 19:58:22,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:22,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:22,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:22,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:22,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=657, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:22,702 INFO L87 Difference]: Start difference. First operand 8307 states and 20560 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:23,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:23,383 INFO L93 Difference]: Finished difference Result 10090 states and 24506 transitions. [2022-03-03 19:58:23,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:58:23,383 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:23,395 INFO L225 Difference]: With dead ends: 10090 [2022-03-03 19:58:23,396 INFO L226 Difference]: Without dead ends: 10051 [2022-03-03 19:58:23,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1362, Invalid=4040, Unknown=0, NotChecked=0, Total=5402 [2022-03-03 19:58:23,396 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 255 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:23,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 187 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10051 states. [2022-03-03 19:58:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10051 to 8258. [2022-03-03 19:58:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8258 states, 8257 states have (on average 2.4717209640305198) internal successors, (20409), 8257 states have internal predecessors, (20409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8258 states to 8258 states and 20409 transitions. [2022-03-03 19:58:23,509 INFO L78 Accepts]: Start accepts. Automaton has 8258 states and 20409 transitions. Word has length 32 [2022-03-03 19:58:23,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:23,509 INFO L470 AbstractCegarLoop]: Abstraction has 8258 states and 20409 transitions. [2022-03-03 19:58:23,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 29 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:23,510 INFO L276 IsEmpty]: Start isEmpty. Operand 8258 states and 20409 transitions. [2022-03-03 19:58:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:23,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:23,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:23,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:23,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:23,753 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:23,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:23,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1331349556, now seen corresponding path program 123 times [2022-03-03 19:58:23,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:23,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046441194] [2022-03-03 19:58:23,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:23,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:23,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:23,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046441194] [2022-03-03 19:58:23,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046441194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:23,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468394384] [2022-03-03 19:58:23,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:23,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:23,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:23,841 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:23,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-03 19:58:23,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:58:23,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:23,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:23,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:24,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:24,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468394384] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:24,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:24,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 30 [2022-03-03 19:58:24,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26710907] [2022-03-03 19:58:24,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:24,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:58:24,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:24,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:58:24,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:24,183 INFO L87 Difference]: Start difference. First operand 8258 states and 20409 transitions. Second operand has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:25,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:25,750 INFO L93 Difference]: Finished difference Result 11335 states and 27281 transitions. [2022-03-03 19:58:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-03 19:58:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:25,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:25,769 INFO L225 Difference]: With dead ends: 11335 [2022-03-03 19:58:25,769 INFO L226 Difference]: Without dead ends: 11335 [2022-03-03 19:58:25,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5298 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3777, Invalid=9333, Unknown=0, NotChecked=0, Total=13110 [2022-03-03 19:58:25,771 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 517 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:25,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 311 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-03 19:58:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11335 states. [2022-03-03 19:58:25,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11335 to 8765. [2022-03-03 19:58:25,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8764 states have (on average 2.4679370150616156) internal successors, (21629), 8764 states have internal predecessors, (21629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:25,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 21629 transitions. [2022-03-03 19:58:25,929 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 21629 transitions. Word has length 32 [2022-03-03 19:58:25,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:25,930 INFO L470 AbstractCegarLoop]: Abstraction has 8765 states and 21629 transitions. [2022-03-03 19:58:25,930 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.4516129032258065) internal successors, (76), 30 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:25,930 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 21629 transitions. [2022-03-03 19:58:25,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:25,939 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:25,939 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:25,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:26,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-03 19:58:26,156 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:26,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2053455692, now seen corresponding path program 124 times [2022-03-03 19:58:26,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:26,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592550099] [2022-03-03 19:58:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:26,209 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:26,209 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:26,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592550099] [2022-03-03 19:58:26,209 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592550099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:26,209 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100682337] [2022-03-03 19:58:26,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:26,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:26,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:26,211 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:26,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-03 19:58:26,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:26,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:26,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:26,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:26,390 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:26,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:26,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100682337] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:26,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:26,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-03 19:58:26,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085020257] [2022-03-03 19:58:26,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:26,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:26,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:26,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:26,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:26,513 INFO L87 Difference]: Start difference. First operand 8765 states and 21629 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:27,407 INFO L93 Difference]: Finished difference Result 9947 states and 24230 transitions. [2022-03-03 19:58:27,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-03 19:58:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:27,426 INFO L225 Difference]: With dead ends: 9947 [2022-03-03 19:58:27,426 INFO L226 Difference]: Without dead ends: 9929 [2022-03-03 19:58:27,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1295, Invalid=3675, Unknown=0, NotChecked=0, Total=4970 [2022-03-03 19:58:27,427 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 231 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:27,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 169 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:27,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2022-03-03 19:58:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 8876. [2022-03-03 19:58:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8876 states, 8875 states have (on average 2.468732394366197) internal successors, (21910), 8875 states have internal predecessors, (21910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8876 states to 8876 states and 21910 transitions. [2022-03-03 19:58:27,589 INFO L78 Accepts]: Start accepts. Automaton has 8876 states and 21910 transitions. Word has length 32 [2022-03-03 19:58:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:27,589 INFO L470 AbstractCegarLoop]: Abstraction has 8876 states and 21910 transitions. [2022-03-03 19:58:27,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 8876 states and 21910 transitions. [2022-03-03 19:58:27,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:27,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:27,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:27,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-03 19:58:27,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-03 19:58:27,816 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:27,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:27,817 INFO L85 PathProgramCache]: Analyzing trace with hash 657899504, now seen corresponding path program 125 times [2022-03-03 19:58:27,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:27,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942724901] [2022-03-03 19:58:27,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:27,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:27,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:27,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942724901] [2022-03-03 19:58:27,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942724901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:27,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035895175] [2022-03-03 19:58:27,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:27,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:27,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:27,899 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:27,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-03 19:58:27,921 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:58:27,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:27,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:27,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:28,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035895175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:28,225 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:28,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 30 [2022-03-03 19:58:28,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546746554] [2022-03-03 19:58:28,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:28,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-03 19:58:28,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-03 19:58:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-03-03 19:58:28,225 INFO L87 Difference]: Start difference. First operand 8876 states and 21910 transitions. Second operand has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:29,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:29,943 INFO L93 Difference]: Finished difference Result 14408 states and 35433 transitions. [2022-03-03 19:58:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-03 19:58:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:29,965 INFO L225 Difference]: With dead ends: 14408 [2022-03-03 19:58:29,965 INFO L226 Difference]: Without dead ends: 14408 [2022-03-03 19:58:29,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7222 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4899, Invalid=12131, Unknown=0, NotChecked=0, Total=17030 [2022-03-03 19:58:29,966 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 463 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:29,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [463 Valid, 286 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:29,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14408 states. [2022-03-03 19:58:30,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14408 to 12637. [2022-03-03 19:58:30,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12637 states, 12636 states have (on average 2.5214466603355494) internal successors, (31861), 12636 states have internal predecessors, (31861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:30,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12637 states to 12637 states and 31861 transitions. [2022-03-03 19:58:30,181 INFO L78 Accepts]: Start accepts. Automaton has 12637 states and 31861 transitions. Word has length 32 [2022-03-03 19:58:30,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:30,181 INFO L470 AbstractCegarLoop]: Abstraction has 12637 states and 31861 transitions. [2022-03-03 19:58:30,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.5483870967741935) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:30,181 INFO L276 IsEmpty]: Start isEmpty. Operand 12637 states and 31861 transitions. [2022-03-03 19:58:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:30,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:30,193 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:30,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:30,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-03 19:58:30,409 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:30,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1094181720, now seen corresponding path program 126 times [2022-03-03 19:58:30,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:30,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392282995] [2022-03-03 19:58:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:30,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:30,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:30,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392282995] [2022-03-03 19:58:30,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392282995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:30,489 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150937987] [2022-03-03 19:58:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:30,491 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:30,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-03 19:58:30,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:58:30,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:30,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:30,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:30,709 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:30,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:30,903 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:30,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150937987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:30,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:30,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 29 [2022-03-03 19:58:30,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448920083] [2022-03-03 19:58:30,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:30,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:30,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:30,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:30,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=654, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:30,904 INFO L87 Difference]: Start difference. First operand 12637 states and 31861 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:32,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:32,322 INFO L93 Difference]: Finished difference Result 13741 states and 34101 transitions. [2022-03-03 19:58:32,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-03 19:58:32,322 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:32,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:32,345 INFO L225 Difference]: With dead ends: 13741 [2022-03-03 19:58:32,345 INFO L226 Difference]: Without dead ends: 13737 [2022-03-03 19:58:32,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2532, Invalid=6398, Unknown=0, NotChecked=0, Total=8930 [2022-03-03 19:58:32,346 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 453 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:32,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [453 Valid, 109 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13737 states. [2022-03-03 19:58:32,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13737 to 12489. [2022-03-03 19:58:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12489 states, 12488 states have (on average 2.5190582959641254) internal successors, (31458), 12488 states have internal predecessors, (31458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12489 states to 12489 states and 31458 transitions. [2022-03-03 19:58:32,584 INFO L78 Accepts]: Start accepts. Automaton has 12489 states and 31458 transitions. Word has length 32 [2022-03-03 19:58:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:32,584 INFO L470 AbstractCegarLoop]: Abstraction has 12489 states and 31458 transitions. [2022-03-03 19:58:32,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:32,585 INFO L276 IsEmpty]: Start isEmpty. Operand 12489 states and 31458 transitions. [2022-03-03 19:58:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:32,595 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:32,596 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:32,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:32,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:32,801 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:32,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:32,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1600527986, now seen corresponding path program 127 times [2022-03-03 19:58:32,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:32,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076201447] [2022-03-03 19:58:32,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:32,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:32,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:32,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:32,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076201447] [2022-03-03 19:58:32,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076201447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:32,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612294391] [2022-03-03 19:58:32,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-03 19:58:32,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:32,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:32,868 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:32,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-03 19:58:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:32,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:32,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:33,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:33,191 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:33,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612294391] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:33,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:33,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 29 [2022-03-03 19:58:33,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695244885] [2022-03-03 19:58:33,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:33,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:33,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:33,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:33,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:33,192 INFO L87 Difference]: Start difference. First operand 12489 states and 31458 transitions. Second operand has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:34,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:34,178 INFO L93 Difference]: Finished difference Result 14347 states and 35676 transitions. [2022-03-03 19:58:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-03 19:58:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:34,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:34,202 INFO L225 Difference]: With dead ends: 14347 [2022-03-03 19:58:34,202 INFO L226 Difference]: Without dead ends: 14335 [2022-03-03 19:58:34,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2483 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2173, Invalid=5659, Unknown=0, NotChecked=0, Total=7832 [2022-03-03 19:58:34,203 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 400 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:34,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [400 Valid, 117 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:34,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14335 states. [2022-03-03 19:58:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14335 to 12923. [2022-03-03 19:58:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12923 states, 12922 states have (on average 2.524609193623278) internal successors, (32623), 12922 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:34,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12923 states to 12923 states and 32623 transitions. [2022-03-03 19:58:34,456 INFO L78 Accepts]: Start accepts. Automaton has 12923 states and 32623 transitions. Word has length 32 [2022-03-03 19:58:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:34,456 INFO L470 AbstractCegarLoop]: Abstraction has 12923 states and 32623 transitions. [2022-03-03 19:58:34,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.433333333333333) internal successors, (73), 29 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:34,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12923 states and 32623 transitions. [2022-03-03 19:58:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:34,467 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:34,467 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:34,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:34,671 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:34,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:34,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1827749366, now seen corresponding path program 128 times [2022-03-03 19:58:34,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:34,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565305373] [2022-03-03 19:58:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:34,750 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:34,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565305373] [2022-03-03 19:58:34,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565305373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:34,750 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994311141] [2022-03-03 19:58:34,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-03 19:58:34,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:34,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:34,751 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:34,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-03 19:58:34,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-03 19:58:34,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:34,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:34,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:34,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:35,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994311141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:35,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:35,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 29 [2022-03-03 19:58:35,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108922190] [2022-03-03 19:58:35,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:35,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:35,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:35,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:35,095 INFO L87 Difference]: Start difference. First operand 12923 states and 32623 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:36,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:36,232 INFO L93 Difference]: Finished difference Result 15734 states and 39180 transitions. [2022-03-03 19:58:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:58:36,232 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:36,257 INFO L225 Difference]: With dead ends: 15734 [2022-03-03 19:58:36,257 INFO L226 Difference]: Without dead ends: 15714 [2022-03-03 19:58:36,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1999, Invalid=5311, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:58:36,258 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 365 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:36,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 131 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:36,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15714 states. [2022-03-03 19:58:36,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15714 to 14459. [2022-03-03 19:58:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14459 states, 14458 states have (on average 2.5336837736893068) internal successors, (36632), 14458 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:36,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14459 states to 14459 states and 36632 transitions. [2022-03-03 19:58:36,540 INFO L78 Accepts]: Start accepts. Automaton has 14459 states and 36632 transitions. Word has length 32 [2022-03-03 19:58:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:36,540 INFO L470 AbstractCegarLoop]: Abstraction has 14459 states and 36632 transitions. [2022-03-03 19:58:36,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 29 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 14459 states and 36632 transitions. [2022-03-03 19:58:36,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:36,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:36,551 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:36,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:36,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2022-03-03 19:58:36,756 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1144163450, now seen corresponding path program 129 times [2022-03-03 19:58:36,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:36,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640293194] [2022-03-03 19:58:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:36,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:36,829 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-03 19:58:36,829 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:36,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640293194] [2022-03-03 19:58:36,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640293194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:36,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445233893] [2022-03-03 19:58:36,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-03 19:58:36,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:36,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:36,830 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-03 19:58:36,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-03 19:58:36,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:36,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:37,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445233893] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:37,151 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:37,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-03-03 19:58:37,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888296996] [2022-03-03 19:58:37,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:37,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:37,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:37,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:37,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:37,152 INFO L87 Difference]: Start difference. First operand 14459 states and 36632 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:38,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:38,147 INFO L93 Difference]: Finished difference Result 17438 states and 43555 transitions. [2022-03-03 19:58:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-03 19:58:38,148 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:38,175 INFO L225 Difference]: With dead ends: 17438 [2022-03-03 19:58:38,175 INFO L226 Difference]: Without dead ends: 17410 [2022-03-03 19:58:38,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2263 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1968, Invalid=5342, Unknown=0, NotChecked=0, Total=7310 [2022-03-03 19:58:38,176 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 345 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:38,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 139 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-03 19:58:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17410 states. [2022-03-03 19:58:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17410 to 16063. [2022-03-03 19:58:38,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16063 states, 16062 states have (on average 2.541588843232474) internal successors, (40823), 16062 states have internal predecessors, (40823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16063 states to 16063 states and 40823 transitions. [2022-03-03 19:58:38,528 INFO L78 Accepts]: Start accepts. Automaton has 16063 states and 40823 transitions. Word has length 32 [2022-03-03 19:58:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:38,528 INFO L470 AbstractCegarLoop]: Abstraction has 16063 states and 40823 transitions. [2022-03-03 19:58:38,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:38,529 INFO L276 IsEmpty]: Start isEmpty. Operand 16063 states and 40823 transitions. [2022-03-03 19:58:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-03 19:58:38,544 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:38,544 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:38,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-03 19:58:38,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-03 19:58:38,753 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:38,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:38,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1348094462, now seen corresponding path program 130 times [2022-03-03 19:58:38,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:38,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150341233] [2022-03-03 19:58:38,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:38,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:38,840 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:38,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:38,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150341233] [2022-03-03 19:58:38,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150341233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:38,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141581953] [2022-03-03 19:58:38,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-03 19:58:38,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:38,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:38,842 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:38,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-03 19:58:38,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-03 19:58:38,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:38,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-03 19:58:38,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:39,238 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:39,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141581953] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:39,238 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:39,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-03-03 19:58:39,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021742741] [2022-03-03 19:58:39,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:39,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-03 19:58:39,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:39,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-03 19:58:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2022-03-03 19:58:39,239 INFO L87 Difference]: Start difference. First operand 16063 states and 40823 transitions. Second operand has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:40,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:40,317 INFO L93 Difference]: Finished difference Result 17847 states and 44751 transitions. [2022-03-03 19:58:40,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-03 19:58:40,317 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-03 19:58:40,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:40,347 INFO L225 Difference]: With dead ends: 17847 [2022-03-03 19:58:40,347 INFO L226 Difference]: Without dead ends: 17811 [2022-03-03 19:58:40,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1702, Invalid=4778, Unknown=0, NotChecked=0, Total=6480 [2022-03-03 19:58:40,348 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 365 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:40,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 147 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-03 19:58:40,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17811 states. [2022-03-03 19:58:40,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17811 to 16586. [2022-03-03 19:58:40,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16586 states, 16585 states have (on average 2.5454326198372024) internal successors, (42216), 16585 states have internal predecessors, (42216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:40,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16586 states to 16586 states and 42216 transitions. [2022-03-03 19:58:40,682 INFO L78 Accepts]: Start accepts. Automaton has 16586 states and 42216 transitions. Word has length 32 [2022-03-03 19:58:40,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:40,682 INFO L470 AbstractCegarLoop]: Abstraction has 16586 states and 42216 transitions. [2022-03-03 19:58:40,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:40,682 INFO L276 IsEmpty]: Start isEmpty. Operand 16586 states and 42216 transitions. [2022-03-03 19:58:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:58:40,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:40,700 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:40,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:40,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-03 19:58:40,904 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:40,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1540614240, now seen corresponding path program 131 times [2022-03-03 19:58:40,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:40,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857642666] [2022-03-03 19:58:40,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:40,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:41,283 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:41,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:41,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857642666] [2022-03-03 19:58:41,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857642666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:41,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500391315] [2022-03-03 19:58:41,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-03 19:58:41,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:41,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:41,284 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:41,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-03 19:58:41,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-03 19:58:41,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:41,308 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-03 19:58:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:41,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:41,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:41,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:41,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:41,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2022-03-03 19:58:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:41,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:42,511 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-03 19:58:42,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 51 treesize of output 256 [2022-03-03 19:58:44,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:44,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:44,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:44,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 3 [2022-03-03 19:58:44,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:44,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500391315] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-03 19:58:44,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-03 19:58:44,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 37 [2022-03-03 19:58:44,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141101489] [2022-03-03 19:58:44,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-03 19:58:44,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-03 19:58:44,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-03 19:58:44,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-03 19:58:44,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1273, Unknown=0, NotChecked=0, Total=1406 [2022-03-03 19:58:44,101 INFO L87 Difference]: Start difference. First operand 16586 states and 42216 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-03 19:58:48,674 INFO L93 Difference]: Finished difference Result 22037 states and 54396 transitions. [2022-03-03 19:58:48,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-03 19:58:48,674 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-03 19:58:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-03 19:58:48,759 INFO L225 Difference]: With dead ends: 22037 [2022-03-03 19:58:48,759 INFO L226 Difference]: Without dead ends: 22030 [2022-03-03 19:58:48,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4450 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1180, Invalid=13826, Unknown=0, NotChecked=0, Total=15006 [2022-03-03 19:58:48,760 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 209 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-03 19:58:48,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 295 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1094 Invalid, 0 Unknown, 891 Unchecked, 0.7s Time] [2022-03-03 19:58:48,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22030 states. [2022-03-03 19:58:48,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22030 to 17150. [2022-03-03 19:58:48,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17150 states, 17149 states have (on average 2.5389235523937255) internal successors, (43540), 17149 states have internal predecessors, (43540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:49,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17150 states to 17150 states and 43540 transitions. [2022-03-03 19:58:49,017 INFO L78 Accepts]: Start accepts. Automaton has 17150 states and 43540 transitions. Word has length 34 [2022-03-03 19:58:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-03 19:58:49,018 INFO L470 AbstractCegarLoop]: Abstraction has 17150 states and 43540 transitions. [2022-03-03 19:58:49,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 37 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-03 19:58:49,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17150 states and 43540 transitions. [2022-03-03 19:58:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-03 19:58:49,035 INFO L506 BasicCegarLoop]: Found error trace [2022-03-03 19:58:49,035 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-03 19:58:49,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-03 19:58:49,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-03 19:58:49,241 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-03 19:58:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-03 19:58:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash -483926296, now seen corresponding path program 132 times [2022-03-03 19:58:49,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-03 19:58:49,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493340945] [2022-03-03 19:58:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-03 19:58:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-03 19:58:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-03 19:58:49,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:49,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-03 19:58:49,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493340945] [2022-03-03 19:58:49,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493340945] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-03 19:58:49,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170538046] [2022-03-03 19:58:49,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-03 19:58:49,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-03 19:58:49,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-03 19:58:49,611 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-03 19:58:49,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-03 19:58:49,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-03 19:58:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-03 19:58:49,635 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-03 19:58:49,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-03 19:58:50,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:50,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:50,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-03 19:58:50,883 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-03 19:58:50,905 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-03 19:58:50,905 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2022-03-03 19:58:51,653 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-03 19:58:51,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-03 19:58:54,110 INFO L353 Elim1Store]: treesize reduction 156, result has 66.7 percent of original size [2022-03-03 19:58:54,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 93 treesize of output 342 Received shutdown request... [2022-03-03 20:00:03,080 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:00:03,091 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-03 20:00:03,128 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-03 20:00:03,130 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-03 20:00:03,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2022-03-03 20:00:03,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-03 20:00:03,343 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 50ms.. [2022-03-03 20:00:03,345 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-03 20:00:03,345 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-03 20:00:03,347 INFO L732 BasicCegarLoop]: Path program histogram: [132, 2, 2, 1] [2022-03-03 20:00:03,349 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-03 20:00:03,349 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-03 20:00:03,350 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.03 08:00:03 BasicIcfg [2022-03-03 20:00:03,350 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-03 20:00:03,350 INFO L158 Benchmark]: Toolchain (without parser) took 880908.22ms. Allocated memory was 162.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 126.8MB in the beginning and 943.0MB in the end (delta: -816.2MB). Peak memory consumption was 996.3MB. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 162.5MB. Free memory is still 127.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.07ms. Allocated memory is still 162.5MB. Free memory was 126.7MB in the beginning and 125.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 INFO L158 Benchmark]: Boogie Preprocessor took 11.72ms. Allocated memory is still 162.5MB. Free memory was 125.2MB in the beginning and 124.3MB in the end (delta: 948.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 INFO L158 Benchmark]: RCFGBuilder took 177.90ms. Allocated memory is still 162.5MB. Free memory was 124.2MB in the beginning and 115.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 INFO L158 Benchmark]: TraceAbstraction took 880695.87ms. Allocated memory was 162.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 114.8MB in the beginning and 943.0MB in the end (delta: -828.2MB). Peak memory consumption was 984.7MB. Max. memory is 8.0GB. [2022-03-03 20:00:03,350 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 0.12ms. Allocated memory is still 162.5MB. Free memory is still 127.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.07ms. Allocated memory is still 162.5MB. Free memory was 126.7MB in the beginning and 125.2MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 11.72ms. Allocated memory is still 162.5MB. Free memory was 125.2MB in the beginning and 124.3MB in the end (delta: 948.3kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 177.90ms. Allocated memory is still 162.5MB. Free memory was 124.2MB in the beginning and 115.4MB in the end (delta: 8.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 880695.87ms. Allocated memory was 162.5MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 114.8MB in the beginning and 943.0MB in the end (delta: -828.2MB). Peak memory consumption was 984.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 50ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 50ms.. - TimeoutResultAtElement [Line: 45]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 50ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 31 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 880.6s, OverallIterations: 137, TraceHistogramMax: 5, PathProgramHistogramMax: 132, EmptinessCheckTime: 0.7s, AutomataDifference: 204.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 30280 SdHoareTripleChecker+Valid, 43.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 30280 mSDsluCounter, 26159 SdHoareTripleChecker+Invalid, 37.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 21670 IncrementalHoareTripleChecker+Unchecked, 43162 mSDsCounter, 9178 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 91485 IncrementalHoareTripleChecker+Invalid, 122333 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9178 mSolverCounterUnsat, 2359 mSDtfsCounter, 91485 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 14244 GetRequests, 5087 SyntacticMatches, 577 SemanticMatches, 8580 ConstructedPredicates, 0 IntricatePredicates, 10 DeprecatedPredicates, 203357 ImplicationChecksByTransitivity, 202.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17150occurred in iteration=136, InterpolantAutomatonStates: 6606, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 9.1s AutomataMinimizationTime, 136 MinimizatonAttempts, 132230 StatesRemovedByMinimization, 136 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 559.4s InterpolantComputationTime, 7306 NumberOfCodeBlocks, 7306 NumberOfCodeBlocksAsserted, 554 NumberOfCheckSat, 10528 ConstructedInterpolants, 596 QuantifiedInterpolants, 193246 SizeOfPredicates, 887 NumberOfNonLiveVariables, 8131 ConjunctsInSsa, 2938 ConjunctsInUnsatCore, 400 InterpolantComputations, 5 PerfectInterpolantSequences, 2163/9768 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown