/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/prod-cons3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:58:38,272 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:58:38,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:58:38,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:58:38,331 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 14:58:38,352 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:58:38,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:58:38,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:58:38,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:58:38,353 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:58:38,353 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:58:38,354 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:58:38,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:58:38,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:58:38,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:58:38,354 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:58:38,354 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:58:38,355 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:58:38,356 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:58:38,356 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:58:38,356 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:58:38,356 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:58:38,356 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:58:38,356 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:58:38,357 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:58:38,357 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:58:38,357 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:58:38,357 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:58:38,357 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:58:38,358 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:58:38,358 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:58:38,358 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:58:38,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:58:38,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:58:38,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:58:38,704 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:58:38,706 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:58:38,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl [2021-08-06 14:58:38,707 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons3.wvr.bpl' [2021-08-06 14:58:38,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:58:38,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:58:38,754 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:58:38,754 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:58:38,755 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:58:38,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,783 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:58:38,784 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:58:38,785 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:58:38,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:58:38,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,795 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,795 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:58:38,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:58:38,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:58:38,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:58:38,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/1) ... [2021-08-06 14:58:38,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:58:38,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:38,842 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) [2021-08-06 14:58:38,856 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 [2021-08-06 14:58:38,888 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:58:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:58:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:58:38,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:58:38,889 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:58:38,889 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:58:38,889 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:58:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:58:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:58:38,890 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:58:38,890 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:58:38,890 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:58:38,891 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-08-06 14:58:38,891 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-08-06 14:58:38,891 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-08-06 14:58:38,892 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 14:58:39,149 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:58:39,149 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 14:58:39,151 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:58:39 BoogieIcfgContainer [2021-08-06 14:58:39,151 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:58:39,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:58:39,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:58:39,155 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:58:39,155 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:58:38" (1/2) ... [2021-08-06 14:58:39,156 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a446cfe and model type prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:58:39, skipping insertion in model container [2021-08-06 14:58:39,156 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:58:39" (2/2) ... [2021-08-06 14:58:39,157 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons3.wvr.bpl [2021-08-06 14:58:39,173 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:58:39,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:58:39,174 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:58:39,174 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:58:39,246 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-08-06 14:58:39,297 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:58:39,305 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-06 14:58:39,305 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-06 14:58:39,319 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 40 transitions, 112 flow [2021-08-06 14:58:39,398 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:39,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:39,427 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:39,427 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:39,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:39,432 INFO L82 PathProgramCache]: Analyzing trace with hash 179406345, now seen corresponding path program 1 times [2021-08-06 14:58:39,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:39,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396294563] [2021-08-06 14:58:39,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:39,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:39,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:39,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:39,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:39,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396294563] [2021-08-06 14:58:39,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396294563] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:39,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:58:39,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:58:39,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453119438] [2021-08-06 14:58:39,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:58:39,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:58:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:39,604 INFO L87 Difference]: Start difference. First operand has 753 states, 752 states have (on average 3.636968085106383) internal successors, (2735), 752 states have internal predecessors, (2735), 0 states have call successors, (0), 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 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:39,672 INFO L93 Difference]: Finished difference Result 912 states and 3051 transitions. [2021-08-06 14:58:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:58:39,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:39,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:39,692 INFO L225 Difference]: With dead ends: 912 [2021-08-06 14:58:39,692 INFO L226 Difference]: Without dead ends: 539 [2021-08-06 14:58:39,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:39,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-06 14:58:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-08-06 14:58:39,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 3.163568773234201) internal successors, (1702), 538 states have internal predecessors, (1702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1702 transitions. [2021-08-06 14:58:39,799 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1702 transitions. Word has length 24 [2021-08-06 14:58:39,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:39,800 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1702 transitions. [2021-08-06 14:58:39,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1702 transitions. [2021-08-06 14:58:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:58:39,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:39,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:39,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:58:39,806 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:39,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:39,813 INFO L82 PathProgramCache]: Analyzing trace with hash -483784061, now seen corresponding path program 2 times [2021-08-06 14:58:39,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:39,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831248797] [2021-08-06 14:58:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:39,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:39,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:39,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:39,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831248797] [2021-08-06 14:58:39,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831248797] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:39,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:58:39,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:58:39,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897480796] [2021-08-06 14:58:39,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:58:39,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:39,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:58:39,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:58:39,901 INFO L87 Difference]: Start difference. First operand 539 states and 1702 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:39,962 INFO L93 Difference]: Finished difference Result 863 states and 2726 transitions. [2021-08-06 14:58:39,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:58:39,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:58:39,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:39,969 INFO L225 Difference]: With dead ends: 863 [2021-08-06 14:58:39,969 INFO L226 Difference]: Without dead ends: 671 [2021-08-06 14:58:39,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:58:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-08-06 14:58:39,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 671. [2021-08-06 14:58:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 671 states, 670 states have (on average 3.2208955223880595) internal successors, (2158), 670 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 2158 transitions. [2021-08-06 14:58:39,996 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 2158 transitions. Word has length 24 [2021-08-06 14:58:39,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:39,997 INFO L470 AbstractCegarLoop]: Abstraction has 671 states and 2158 transitions. [2021-08-06 14:58:39,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:39,997 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 2158 transitions. [2021-08-06 14:58:39,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-06 14:58:39,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:39,999 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:39,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:58:40,000 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:40,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:40,000 INFO L82 PathProgramCache]: Analyzing trace with hash 683624999, now seen corresponding path program 1 times [2021-08-06 14:58:40,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:40,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792976978] [2021-08-06 14:58:40,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:40,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:40,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:40,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792976978] [2021-08-06 14:58:40,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792976978] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:40,068 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:58:40,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:58:40,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109934544] [2021-08-06 14:58:40,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:58:40,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:40,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:58:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:40,070 INFO L87 Difference]: Start difference. First operand 671 states and 2158 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:40,090 INFO L93 Difference]: Finished difference Result 752 states and 2398 transitions. [2021-08-06 14:58:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:58:40,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-06 14:58:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:40,104 INFO L225 Difference]: With dead ends: 752 [2021-08-06 14:58:40,104 INFO L226 Difference]: Without dead ends: 752 [2021-08-06 14:58:40,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:40,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2021-08-06 14:58:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2021-08-06 14:58:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.193075898801598) internal successors, (2398), 751 states have internal predecessors, (2398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2398 transitions. [2021-08-06 14:58:40,141 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2398 transitions. Word has length 27 [2021-08-06 14:58:40,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:40,141 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2398 transitions. [2021-08-06 14:58:40,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,141 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2398 transitions. [2021-08-06 14:58:40,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 14:58:40,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:40,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:40,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:58:40,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:40,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:40,145 INFO L82 PathProgramCache]: Analyzing trace with hash -699174524, now seen corresponding path program 1 times [2021-08-06 14:58:40,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:40,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547113656] [2021-08-06 14:58:40,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:40,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:40,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:58:40,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:40,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547113656] [2021-08-06 14:58:40,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547113656] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:40,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:58:40,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 14:58:40,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289123192] [2021-08-06 14:58:40,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 14:58:40,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:40,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 14:58:40,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:40,212 INFO L87 Difference]: Start difference. First operand 752 states and 2398 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:40,228 INFO L93 Difference]: Finished difference Result 800 states and 2514 transitions. [2021-08-06 14:58:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 14:58:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 14:58:40,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:40,234 INFO L225 Difference]: With dead ends: 800 [2021-08-06 14:58:40,234 INFO L226 Difference]: Without dead ends: 774 [2021-08-06 14:58:40,235 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 14:58:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2021-08-06 14:58:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 774. [2021-08-06 14:58:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.1720569210866754) internal successors, (2452), 773 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2452 transitions. [2021-08-06 14:58:40,275 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2452 transitions. Word has length 31 [2021-08-06 14:58:40,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:40,275 INFO L470 AbstractCegarLoop]: Abstraction has 774 states and 2452 transitions. [2021-08-06 14:58:40,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:40,276 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2452 transitions. [2021-08-06 14:58:40,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 14:58:40,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:40,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:40,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:58:40,280 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:40,281 INFO L82 PathProgramCache]: Analyzing trace with hash 555677261, now seen corresponding path program 1 times [2021-08-06 14:58:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:40,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332875843] [2021-08-06 14:58:40,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:40,285 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:40,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:40,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:40,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332875843] [2021-08-06 14:58:40,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332875843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:40,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531722134] [2021-08-06 14:58:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:40,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:40,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:40,692 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) [2021-08-06 14:58:40,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 14:58:40,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 14:58:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:41,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:58:41,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:58:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:41,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531722134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:41,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:41,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 23 [2021-08-06 14:58:41,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125896484] [2021-08-06 14:58:41,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 14:58:41,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:41,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 14:58:41,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:58:41,591 INFO L87 Difference]: Start difference. First operand 774 states and 2452 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:42,193 INFO L93 Difference]: Finished difference Result 1455 states and 4673 transitions. [2021-08-06 14:58:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:58:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have 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 [2021-08-06 14:58:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:42,217 INFO L225 Difference]: With dead ends: 1455 [2021-08-06 14:58:42,217 INFO L226 Difference]: Without dead ends: 1119 [2021-08-06 14:58:42,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 565.1ms TimeCoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:58:42,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-08-06 14:58:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 906. [2021-08-06 14:58:42,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.2132596685082873) internal successors, (2908), 905 states have internal predecessors, (2908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2908 transitions. [2021-08-06 14:58:42,246 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2908 transitions. Word has length 34 [2021-08-06 14:58:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:42,247 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2908 transitions. [2021-08-06 14:58:42,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,247 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2908 transitions. [2021-08-06 14:58:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 14:58:42,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:42,251 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:42,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:42,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:42,473 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:42,474 INFO L82 PathProgramCache]: Analyzing trace with hash 561664541, now seen corresponding path program 2 times [2021-08-06 14:58:42,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:42,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35574748] [2021-08-06 14:58:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:42,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:42,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:42,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:42,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:42,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35574748] [2021-08-06 14:58:42,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35574748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:42,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082381423] [2021-08-06 14:58:42,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:58:42,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:42,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:42,525 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) [2021-08-06 14:58:42,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 14:58:42,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:58:42,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:42,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:58:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:58:42,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082381423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:42,824 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:58:42,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-08-06 14:58:42,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719082543] [2021-08-06 14:58:42,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:58:42,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:42,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:58:42,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:58:42,825 INFO L87 Difference]: Start difference. First operand 906 states and 2908 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:42,855 INFO L93 Difference]: Finished difference Result 2380 states and 7576 transitions. [2021-08-06 14:58:42,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:58:42,856 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 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 37 [2021-08-06 14:58:42,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:42,869 INFO L225 Difference]: With dead ends: 2380 [2021-08-06 14:58:42,870 INFO L226 Difference]: Without dead ends: 2330 [2021-08-06 14:58:42,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:58:42,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-08-06 14:58:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1654. [2021-08-06 14:58:42,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1654 states, 1653 states have (on average 3.327283726557774) internal successors, (5500), 1653 states have internal predecessors, (5500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1654 states to 1654 states and 5500 transitions. [2021-08-06 14:58:42,922 INFO L78 Accepts]: Start accepts. Automaton has 1654 states and 5500 transitions. Word has length 37 [2021-08-06 14:58:42,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:42,923 INFO L470 AbstractCegarLoop]: Abstraction has 1654 states and 5500 transitions. [2021-08-06 14:58:42,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1654 states and 5500 transitions. [2021-08-06 14:58:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-06 14:58:42,927 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:42,927 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:42,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:43,146 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 [2021-08-06 14:58:43,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1536215610, now seen corresponding path program 3 times [2021-08-06 14:58:43,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:43,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070666307] [2021-08-06 14:58:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:43,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:43,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:43,191 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:58:43,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070666307] [2021-08-06 14:58:43,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070666307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:43,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618066006] [2021-08-06 14:58:43,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:58:43,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:43,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:43,193 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) [2021-08-06 14:58:43,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 14:58:43,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:58:43,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 14:58:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:43,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 14:58:43,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618066006] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:58:43,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-06 14:58:43,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2021-08-06 14:58:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971950227] [2021-08-06 14:58:43,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:58:43,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:58:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:58:43,516 INFO L87 Difference]: Start difference. First operand 1654 states and 5500 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:43,553 INFO L93 Difference]: Finished difference Result 4845 states and 15851 transitions. [2021-08-06 14:58:43,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:58:43,554 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 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 41 [2021-08-06 14:58:43,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:43,583 INFO L225 Difference]: With dead ends: 4845 [2021-08-06 14:58:43,584 INFO L226 Difference]: Without dead ends: 4554 [2021-08-06 14:58:43,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:58:43,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-08-06 14:58:43,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3828. [2021-08-06 14:58:43,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 3.367650901489417) internal successors, (12888), 3827 states have internal predecessors, (12888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 12888 transitions. [2021-08-06 14:58:43,717 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 12888 transitions. Word has length 41 [2021-08-06 14:58:43,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:43,717 INFO L470 AbstractCegarLoop]: Abstraction has 3828 states and 12888 transitions. [2021-08-06 14:58:43,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:43,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 12888 transitions. [2021-08-06 14:58:43,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:58:43,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:43,731 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:43,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 14:58:43,952 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 [2021-08-06 14:58:43,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 621598743, now seen corresponding path program 4 times [2021-08-06 14:58:43,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:43,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603951023] [2021-08-06 14:58:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:43,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:58:44,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:44,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603951023] [2021-08-06 14:58:44,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603951023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:44,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718511848] [2021-08-06 14:58:44,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:58:44,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:44,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:44,547 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) [2021-08-06 14:58:44,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 14:58:44,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:58:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:58:44,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:45,690 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:58:45,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:58:45,828 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:58:45,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:58:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:45,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718511848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:45,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:45,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-08-06 14:58:45,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937388703] [2021-08-06 14:58:45,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 14:58:45,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 14:58:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1048, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 14:58:45,991 INFO L87 Difference]: Start difference. First operand 3828 states and 12888 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 14:58:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:58:54,537 INFO L93 Difference]: Finished difference Result 26830 states and 89990 transitions. [2021-08-06 14:58:54,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2021-08-06 14:58:54,540 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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 44 [2021-08-06 14:58:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:58:54,657 INFO L225 Difference]: With dead ends: 26830 [2021-08-06 14:58:54,657 INFO L226 Difference]: Without dead ends: 23098 [2021-08-06 14:58:54,666 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17126 ImplicationChecksByTransitivity, 6761.9ms TimeCoverageRelationStatistics Valid=5021, Invalid=37209, Unknown=0, NotChecked=0, Total=42230 [2021-08-06 14:58:54,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23098 states. [2021-08-06 14:58:55,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23098 to 4547. [2021-08-06 14:58:55,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 3.3515178178618568) internal successors, (15236), 4546 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:58:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 15236 transitions. [2021-08-06 14:58:55,078 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 15236 transitions. Word has length 44 [2021-08-06 14:58:55,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:58:55,079 INFO L470 AbstractCegarLoop]: Abstraction has 4547 states and 15236 transitions. [2021-08-06 14:58:55,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 35 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) [2021-08-06 14:58:55,080 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 15236 transitions. [2021-08-06 14:58:55,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:58:55,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:58:55,093 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:58:55,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 14:58:55,308 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 [2021-08-06 14:58:55,308 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:58:55,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:58:55,309 INFO L82 PathProgramCache]: Analyzing trace with hash -857814709, now seen corresponding path program 5 times [2021-08-06 14:58:55,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:58:55,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786646048] [2021-08-06 14:58:55,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:58:55,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:58:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:58:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:55,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:58:55,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786646048] [2021-08-06 14:58:55,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786646048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:55,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509361104] [2021-08-06 14:58:55,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:58:55,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:58:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:58:55,784 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) [2021-08-06 14:58:55,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 14:58:56,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:58:56,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:58:56,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:58:56,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:58:56,887 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:58:56,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2021-08-06 14:58:57,178 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:58:57,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:58:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:58:57,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509361104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:58:57,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:58:57,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:58:57,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890389608] [2021-08-06 14:58:57,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:58:57,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:58:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:58:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:58:57,350 INFO L87 Difference]: Start difference. First operand 4547 states and 15236 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:01,432 INFO L93 Difference]: Finished difference Result 28401 states and 94904 transitions. [2021-08-06 14:59:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-08-06 14:59:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:01,550 INFO L225 Difference]: With dead ends: 28401 [2021-08-06 14:59:01,550 INFO L226 Difference]: Without dead ends: 27869 [2021-08-06 14:59:01,554 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4710 ImplicationChecksByTransitivity, 3061.5ms TimeCoverageRelationStatistics Valid=2046, Invalid=11760, Unknown=0, NotChecked=0, Total=13806 [2021-08-06 14:59:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27869 states. [2021-08-06 14:59:01,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27869 to 5370. [2021-08-06 14:59:01,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.3402868318122554) internal successors, (17934), 5369 states have internal predecessors, (17934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 17934 transitions. [2021-08-06 14:59:01,974 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 17934 transitions. Word has length 44 [2021-08-06 14:59:01,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:01,975 INFO L470 AbstractCegarLoop]: Abstraction has 5370 states and 17934 transitions. [2021-08-06 14:59:01,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 17934 transitions. [2021-08-06 14:59:01,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:01,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:01,989 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:02,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:02,204 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 [2021-08-06 14:59:02,205 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1365138515, now seen corresponding path program 6 times [2021-08-06 14:59:02,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:02,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231627474] [2021-08-06 14:59:02,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:02,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:02,723 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:02,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231627474] [2021-08-06 14:59:02,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231627474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:02,723 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756527871] [2021-08-06 14:59:02,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:02,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:02,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:02,724 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) [2021-08-06 14:59:02,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 14:59:02,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:59:02,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:02,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:02,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:03,646 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:03,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:03,897 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:03,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:04,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756527871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:04,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:04,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:04,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200222911] [2021-08-06 14:59:04,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:04,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:04,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:04,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:04,084 INFO L87 Difference]: Start difference. First operand 5370 states and 17934 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:08,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:08,702 INFO L93 Difference]: Finished difference Result 37756 states and 126024 transitions. [2021-08-06 14:59:08,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-08-06 14:59:08,702 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:08,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:08,837 INFO L225 Difference]: With dead ends: 37756 [2021-08-06 14:59:08,838 INFO L226 Difference]: Without dead ends: 36886 [2021-08-06 14:59:08,841 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5904 ImplicationChecksByTransitivity, 3526.8ms TimeCoverageRelationStatistics Valid=2522, Invalid=14248, Unknown=0, NotChecked=0, Total=16770 [2021-08-06 14:59:08,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36886 states. [2021-08-06 14:59:09,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36886 to 5460. [2021-08-06 14:59:09,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5460 states, 5459 states have (on average 3.3418208463088477) internal successors, (18243), 5459 states have internal predecessors, (18243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:09,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5460 states to 5460 states and 18243 transitions. [2021-08-06 14:59:09,315 INFO L78 Accepts]: Start accepts. Automaton has 5460 states and 18243 transitions. Word has length 44 [2021-08-06 14:59:09,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:09,316 INFO L470 AbstractCegarLoop]: Abstraction has 5460 states and 18243 transitions. [2021-08-06 14:59:09,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:09,316 INFO L276 IsEmpty]: Start isEmpty. Operand 5460 states and 18243 transitions. [2021-08-06 14:59:09,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:09,335 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:09,335 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:09,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:09,548 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 [2021-08-06 14:59:09,549 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:09,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:09,549 INFO L82 PathProgramCache]: Analyzing trace with hash 2011749771, now seen corresponding path program 7 times [2021-08-06 14:59:09,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:09,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833313796] [2021-08-06 14:59:09,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:09,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:09,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:09,986 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:09,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833313796] [2021-08-06 14:59:09,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833313796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:09,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15187395] [2021-08-06 14:59:09,987 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:09,987 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:09,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:09,992 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) [2021-08-06 14:59:09,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 14:59:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:10,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:10,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:10,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:10,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 14:59:11,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:11,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:11,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15187395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:11,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:11,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417960251] [2021-08-06 14:59:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:11,410 INFO L87 Difference]: Start difference. First operand 5460 states and 18243 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:16,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:16,907 INFO L93 Difference]: Finished difference Result 47050 states and 156994 transitions. [2021-08-06 14:59:16,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-08-06 14:59:16,908 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 14:59:16,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:17,030 INFO L225 Difference]: With dead ends: 47050 [2021-08-06 14:59:17,030 INFO L226 Difference]: Without dead ends: 45439 [2021-08-06 14:59:17,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7555 ImplicationChecksByTransitivity, 4300.3ms TimeCoverageRelationStatistics Valid=2979, Invalid=17327, Unknown=0, NotChecked=0, Total=20306 [2021-08-06 14:59:17,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45439 states. [2021-08-06 14:59:17,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45439 to 6441. [2021-08-06 14:59:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6441 states, 6440 states have (on average 3.332919254658385) internal successors, (21464), 6440 states have internal predecessors, (21464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6441 states to 6441 states and 21464 transitions. [2021-08-06 14:59:17,600 INFO L78 Accepts]: Start accepts. Automaton has 6441 states and 21464 transitions. Word has length 44 [2021-08-06 14:59:17,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:17,600 INFO L470 AbstractCegarLoop]: Abstraction has 6441 states and 21464 transitions. [2021-08-06 14:59:17,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 6441 states and 21464 transitions. [2021-08-06 14:59:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:17,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:17,616 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:17,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:17,840 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 [2021-08-06 14:59:17,840 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1976679839, now seen corresponding path program 8 times [2021-08-06 14:59:17,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:17,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723790504] [2021-08-06 14:59:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:17,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:18,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:18,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723790504] [2021-08-06 14:59:18,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723790504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:18,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524623414] [2021-08-06 14:59:18,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:18,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:18,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:18,330 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) [2021-08-06 14:59:18,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 14:59:18,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:18,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:18,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:19,431 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:19,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:19,618 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:19,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:19,756 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:19,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524623414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:19,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:19,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:19,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347599528] [2021-08-06 14:59:19,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:19,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:19,758 INFO L87 Difference]: Start difference. First operand 6441 states and 21464 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:24,401 INFO L93 Difference]: Finished difference Result 40863 states and 136185 transitions. [2021-08-06 14:59:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-08-06 14:59:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:24,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:24,534 INFO L225 Difference]: With dead ends: 40863 [2021-08-06 14:59:24,534 INFO L226 Difference]: Without dead ends: 40043 [2021-08-06 14:59:24,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5762 ImplicationChecksByTransitivity, 3309.0ms TimeCoverageRelationStatistics Valid=2398, Invalid=14114, Unknown=0, NotChecked=0, Total=16512 [2021-08-06 14:59:24,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40043 states. [2021-08-06 14:59:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40043 to 6540. [2021-08-06 14:59:24,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6540 states, 6539 states have (on average 3.3339960238568587) internal successors, (21801), 6539 states have internal predecessors, (21801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6540 states to 6540 states and 21801 transitions. [2021-08-06 14:59:24,888 INFO L78 Accepts]: Start accepts. Automaton has 6540 states and 21801 transitions. Word has length 44 [2021-08-06 14:59:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:24,888 INFO L470 AbstractCegarLoop]: Abstraction has 6540 states and 21801 transitions. [2021-08-06 14:59:24,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 6540 states and 21801 transitions. [2021-08-06 14:59:24,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:24,902 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:24,902 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:24,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:25,103 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 [2021-08-06 14:59:25,103 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:25,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1400208447, now seen corresponding path program 9 times [2021-08-06 14:59:25,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:25,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718906825] [2021-08-06 14:59:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:25,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:25,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718906825] [2021-08-06 14:59:25,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718906825] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:25,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161989732] [2021-08-06 14:59:25,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:59:25,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:25,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:25,609 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) [2021-08-06 14:59:25,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 14:59:26,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:59:26,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:26,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:59:26,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:26,777 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:26,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:27,041 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 14:59:27,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-06 14:59:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161989732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:27,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:27,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:27,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494629610] [2021-08-06 14:59:27,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:27,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:27,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:27,186 INFO L87 Difference]: Start difference. First operand 6540 states and 21801 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:32,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:32,564 INFO L93 Difference]: Finished difference Result 45280 states and 150579 transitions. [2021-08-06 14:59:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-06 14:59:32,564 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:32,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:32,723 INFO L225 Difference]: With dead ends: 45280 [2021-08-06 14:59:32,723 INFO L226 Difference]: Without dead ends: 44360 [2021-08-06 14:59:32,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7367 ImplicationChecksByTransitivity, 4264.5ms TimeCoverageRelationStatistics Valid=2906, Invalid=17116, Unknown=0, NotChecked=0, Total=20022 [2021-08-06 14:59:32,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44360 states. [2021-08-06 14:59:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44360 to 6507. [2021-08-06 14:59:33,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6507 states, 6506 states have (on average 3.334153089455887) internal successors, (21692), 6506 states have internal predecessors, (21692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6507 states to 6507 states and 21692 transitions. [2021-08-06 14:59:33,129 INFO L78 Accepts]: Start accepts. Automaton has 6507 states and 21692 transitions. Word has length 44 [2021-08-06 14:59:33,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:33,129 INFO L470 AbstractCegarLoop]: Abstraction has 6507 states and 21692 transitions. [2021-08-06 14:59:33,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 6507 states and 21692 transitions. [2021-08-06 14:59:33,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:33,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:33,143 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:33,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:33,343 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 [2021-08-06 14:59:33,344 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2066642255, now seen corresponding path program 10 times [2021-08-06 14:59:33,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:33,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824622311] [2021-08-06 14:59:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:33,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:33,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:33,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:33,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:33,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824622311] [2021-08-06 14:59:33,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824622311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:33,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921006713] [2021-08-06 14:59:33,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:59:33,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:33,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:33,828 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) [2021-08-06 14:59:33,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 14:59:34,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:59:34,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:34,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:35,003 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:35,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:35,132 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:35,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:35,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:35,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921006713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:35,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:35,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:35,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859086182] [2021-08-06 14:59:35,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:35,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:35,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:35,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:35,271 INFO L87 Difference]: Start difference. First operand 6507 states and 21692 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:41,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:41,679 INFO L93 Difference]: Finished difference Result 40459 states and 134704 transitions. [2021-08-06 14:59:41,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-08-06 14:59:41,679 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 14:59:41,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:41,800 INFO L225 Difference]: With dead ends: 40459 [2021-08-06 14:59:41,800 INFO L226 Difference]: Without dead ends: 39249 [2021-08-06 14:59:41,801 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10083 ImplicationChecksByTransitivity, 4859.9ms TimeCoverageRelationStatistics Valid=3639, Invalid=22767, Unknown=0, NotChecked=0, Total=26406 [2021-08-06 14:59:41,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39249 states. [2021-08-06 14:59:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39249 to 6786. [2021-08-06 14:59:42,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6786 states, 6785 states have (on average 3.3326455416359617) internal successors, (22612), 6785 states have internal predecessors, (22612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:42,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6786 states to 6786 states and 22612 transitions. [2021-08-06 14:59:42,136 INFO L78 Accepts]: Start accepts. Automaton has 6786 states and 22612 transitions. Word has length 44 [2021-08-06 14:59:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:42,137 INFO L470 AbstractCegarLoop]: Abstraction has 6786 states and 22612 transitions. [2021-08-06 14:59:42,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:42,137 INFO L276 IsEmpty]: Start isEmpty. Operand 6786 states and 22612 transitions. [2021-08-06 14:59:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:42,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:42,149 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:42,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:42,349 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 [2021-08-06 14:59:42,350 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1494512399, now seen corresponding path program 11 times [2021-08-06 14:59:42,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:42,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651681135] [2021-08-06 14:59:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:42,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:42,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:42,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651681135] [2021-08-06 14:59:42,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651681135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:42,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890823114] [2021-08-06 14:59:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:59:42,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:42,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:42,739 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) [2021-08-06 14:59:42,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 14:59:43,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:59:43,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 14:59:43,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:43,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:43,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:44,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:44,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890823114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:44,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:44,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:44,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779581375] [2021-08-06 14:59:44,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:44,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:44,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:44,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:44,243 INFO L87 Difference]: Start difference. First operand 6786 states and 22612 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:47,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:47,709 INFO L93 Difference]: Finished difference Result 22180 states and 73880 transitions. [2021-08-06 14:59:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 14:59:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:47,759 INFO L225 Difference]: With dead ends: 22180 [2021-08-06 14:59:47,759 INFO L226 Difference]: Without dead ends: 21908 [2021-08-06 14:59:47,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 2180.5ms TimeCoverageRelationStatistics Valid=1287, Invalid=6723, Unknown=0, NotChecked=0, Total=8010 [2021-08-06 14:59:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21908 states. [2021-08-06 14:59:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21908 to 6570. [2021-08-06 14:59:47,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6570 states, 6569 states have (on average 3.3344496879281476) internal successors, (21904), 6569 states have internal predecessors, (21904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6570 states to 6570 states and 21904 transitions. [2021-08-06 14:59:47,962 INFO L78 Accepts]: Start accepts. Automaton has 6570 states and 21904 transitions. Word has length 44 [2021-08-06 14:59:47,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:47,963 INFO L470 AbstractCegarLoop]: Abstraction has 6570 states and 21904 transitions. [2021-08-06 14:59:47,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:47,963 INFO L276 IsEmpty]: Start isEmpty. Operand 6570 states and 21904 transitions. [2021-08-06 14:59:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:47,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:47,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:47,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:48,176 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 [2021-08-06 14:59:48,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:48,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:48,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1850385115, now seen corresponding path program 12 times [2021-08-06 14:59:48,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:48,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524721247] [2021-08-06 14:59:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:48,178 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:48,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:48,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:48,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524721247] [2021-08-06 14:59:48,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524721247] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:48,562 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021554726] [2021-08-06 14:59:48,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:59:48,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:48,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:48,562 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) [2021-08-06 14:59:48,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 14:59:49,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:59:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:49,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:49,764 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:49,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 14:59:49,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:49,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:50,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021554726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:50,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:50,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:50,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941642615] [2021-08-06 14:59:50,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:50,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:50,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:50,128 INFO L87 Difference]: Start difference. First operand 6570 states and 21904 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:51,897 INFO L93 Difference]: Finished difference Result 12048 states and 40172 transitions. [2021-08-06 14:59:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 14:59:51,897 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 14:59:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:51,923 INFO L225 Difference]: With dead ends: 12048 [2021-08-06 14:59:51,923 INFO L226 Difference]: Without dead ends: 11784 [2021-08-06 14:59:51,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1337.2ms TimeCoverageRelationStatistics Valid=567, Invalid=3593, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 14:59:51,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11784 states. [2021-08-06 14:59:52,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11784 to 6722. [2021-08-06 14:59:52,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6722 states, 6721 states have (on average 3.3309031394137776) internal successors, (22387), 6721 states have internal predecessors, (22387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:52,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6722 states to 6722 states and 22387 transitions. [2021-08-06 14:59:52,063 INFO L78 Accepts]: Start accepts. Automaton has 6722 states and 22387 transitions. Word has length 44 [2021-08-06 14:59:52,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:52,063 INFO L470 AbstractCegarLoop]: Abstraction has 6722 states and 22387 transitions. [2021-08-06 14:59:52,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 14:59:52,063 INFO L276 IsEmpty]: Start isEmpty. Operand 6722 states and 22387 transitions. [2021-08-06 14:59:52,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:52,076 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:52,076 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:52,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 14:59:52,277 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 [2021-08-06 14:59:52,277 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:52,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:52,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1937258375, now seen corresponding path program 13 times [2021-08-06 14:59:52,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:52,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316633226] [2021-08-06 14:59:52,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:52,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:52,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:52,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316633226] [2021-08-06 14:59:52,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316633226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:52,729 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224317581] [2021-08-06 14:59:52,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:59:52,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:52,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:52,730 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) [2021-08-06 14:59:52,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 14:59:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:53,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:53,963 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:53,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 14:59:54,225 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:54,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:54,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224317581] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:54,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:54,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:54,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95672207] [2021-08-06 14:59:54,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:54,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:54,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:54,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:54,389 INFO L87 Difference]: Start difference. First operand 6722 states and 22387 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:56,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:59:56,301 INFO L93 Difference]: Finished difference Result 12931 states and 43239 transitions. [2021-08-06 14:59:56,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 14:59:56,301 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 14:59:56,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:59:56,373 INFO L225 Difference]: With dead ends: 12931 [2021-08-06 14:59:56,374 INFO L226 Difference]: Without dead ends: 12631 [2021-08-06 14:59:56,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 1548.1ms TimeCoverageRelationStatistics Valid=662, Invalid=3894, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 14:59:56,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12631 states. [2021-08-06 14:59:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12631 to 6793. [2021-08-06 14:59:56,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6793 states, 6792 states have (on average 3.3318610129564195) internal successors, (22630), 6792 states have internal predecessors, (22630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:59:56,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6793 states to 6793 states and 22630 transitions. [2021-08-06 14:59:56,492 INFO L78 Accepts]: Start accepts. Automaton has 6793 states and 22630 transitions. Word has length 44 [2021-08-06 14:59:56,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:59:56,492 INFO L470 AbstractCegarLoop]: Abstraction has 6793 states and 22630 transitions. [2021-08-06 14:59:56,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 14:59:56,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6793 states and 22630 transitions. [2021-08-06 14:59:56,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 14:59:56,503 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:59:56,503 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:59:56,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-08-06 14:59:56,703 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 [2021-08-06 14:59:56,704 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 14:59:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:59:56,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1019179365, now seen corresponding path program 14 times [2021-08-06 14:59:56,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:59:56,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265224928] [2021-08-06 14:59:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:59:56,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:59:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:59:57,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:57,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:59:57,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265224928] [2021-08-06 14:59:57,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265224928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:57,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576408874] [2021-08-06 14:59:57,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:59:57,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:59:57,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:59:57,082 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) [2021-08-06 14:59:57,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 14:59:57,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:59:57,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:59:57,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 14:59:57,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:59:58,342 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 14:59:58,617 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 14:59:58,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 14:59:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 14:59:58,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576408874] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:59:58,758 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:59:58,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 14:59:58,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266737941] [2021-08-06 14:59:58,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 14:59:58,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:59:58,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 14:59:58,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1126, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 14:59:58,759 INFO L87 Difference]: Start difference. First operand 6793 states and 22630 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:03,189 INFO L93 Difference]: Finished difference Result 31575 states and 105236 transitions. [2021-08-06 15:00:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-08-06 15:00:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:00:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:03,278 INFO L225 Difference]: With dead ends: 31575 [2021-08-06 15:00:03,278 INFO L226 Difference]: Without dead ends: 31013 [2021-08-06 15:00:03,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 3192.6ms TimeCoverageRelationStatistics Valid=1883, Invalid=9889, Unknown=0, NotChecked=0, Total=11772 [2021-08-06 15:00:03,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31013 states. [2021-08-06 15:00:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31013 to 6874. [2021-08-06 15:00:03,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6874 states, 6873 states have (on average 3.3262039866142876) internal successors, (22861), 6873 states have internal predecessors, (22861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6874 states to 6874 states and 22861 transitions. [2021-08-06 15:00:03,643 INFO L78 Accepts]: Start accepts. Automaton has 6874 states and 22861 transitions. Word has length 44 [2021-08-06 15:00:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:03,643 INFO L470 AbstractCegarLoop]: Abstraction has 6874 states and 22861 transitions. [2021-08-06 15:00:03,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 6874 states and 22861 transitions. [2021-08-06 15:00:03,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:03,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:03,653 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:03,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-06 15:00:03,854 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 [2021-08-06 15:00:03,854 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:03,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:03,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1074071849, now seen corresponding path program 15 times [2021-08-06 15:00:03,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:03,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302201400] [2021-08-06 15:00:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:03,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:04,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:04,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302201400] [2021-08-06 15:00:04,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302201400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:04,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373671407] [2021-08-06 15:00:04,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:00:04,225 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:04,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:04,226 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) [2021-08-06 15:00:04,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:00:04,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:00:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:04,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:00:04,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:06,133 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-08-06 15:00:06,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 37 [2021-08-06 15:00:06,326 INFO L354 Elim1Store]: treesize reduction 30, result has 9.1 percent of original size [2021-08-06 15:00:06,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 24 [2021-08-06 15:00:06,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:06,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373671407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:06,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:06,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:06,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623848473] [2021-08-06 15:00:06,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:06,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:06,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:06,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1125, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:06,479 INFO L87 Difference]: Start difference. First operand 6874 states and 22861 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:17,219 INFO L93 Difference]: Finished difference Result 39009 states and 129354 transitions. [2021-08-06 15:00:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-08-06 15:00:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:00:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:17,314 INFO L225 Difference]: With dead ends: 39009 [2021-08-06 15:00:17,314 INFO L226 Difference]: Without dead ends: 36367 [2021-08-06 15:00:17,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14337 ImplicationChecksByTransitivity, 7212.6ms TimeCoverageRelationStatistics Valid=5129, Invalid=31927, Unknown=0, NotChecked=0, Total=37056 [2021-08-06 15:00:17,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36367 states. [2021-08-06 15:00:17,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36367 to 7905. [2021-08-06 15:00:17,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7905 states, 7904 states have (on average 3.311740890688259) internal successors, (26176), 7904 states have internal predecessors, (26176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:17,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7905 states to 7905 states and 26176 transitions. [2021-08-06 15:00:17,703 INFO L78 Accepts]: Start accepts. Automaton has 7905 states and 26176 transitions. Word has length 44 [2021-08-06 15:00:17,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:17,704 INFO L470 AbstractCegarLoop]: Abstraction has 7905 states and 26176 transitions. [2021-08-06 15:00:17,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:17,704 INFO L276 IsEmpty]: Start isEmpty. Operand 7905 states and 26176 transitions. [2021-08-06 15:00:17,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:17,715 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:17,716 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:17,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:17,917 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 [2021-08-06 15:00:17,918 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:17,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:17,918 INFO L82 PathProgramCache]: Analyzing trace with hash -678348743, now seen corresponding path program 16 times [2021-08-06 15:00:17,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:17,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127897855] [2021-08-06 15:00:17,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:17,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:17,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:18,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:18,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127897855] [2021-08-06 15:00:18,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127897855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:18,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989211072] [2021-08-06 15:00:18,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:00:18,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:18,360 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) [2021-08-06 15:00:18,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:00:19,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:00:19,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:19,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:00:19,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:19,965 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:19,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:00:20,075 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:20,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:00:20,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:20,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989211072] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:20,205 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:20,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:20,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562247763] [2021-08-06 15:00:20,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:20,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:20,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:20,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:20,206 INFO L87 Difference]: Start difference. First operand 7905 states and 26176 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:00:26,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:26,886 INFO L93 Difference]: Finished difference Result 42042 states and 140022 transitions. [2021-08-06 15:00:26,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2021-08-06 15:00:26,887 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 15:00:26,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:26,990 INFO L225 Difference]: With dead ends: 42042 [2021-08-06 15:00:26,991 INFO L226 Difference]: Without dead ends: 37646 [2021-08-06 15:00:26,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12795 ImplicationChecksByTransitivity, 5123.3ms TimeCoverageRelationStatistics Valid=4443, Invalid=28137, Unknown=0, NotChecked=0, Total=32580 [2021-08-06 15:00:27,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37646 states. [2021-08-06 15:00:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37646 to 8427. [2021-08-06 15:00:27,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8427 states, 8426 states have (on average 3.3025160218371705) internal successors, (27827), 8426 states have internal predecessors, (27827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8427 states to 8427 states and 27827 transitions. [2021-08-06 15:00:27,419 INFO L78 Accepts]: Start accepts. Automaton has 8427 states and 27827 transitions. Word has length 44 [2021-08-06 15:00:27,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:27,420 INFO L470 AbstractCegarLoop]: Abstraction has 8427 states and 27827 transitions. [2021-08-06 15:00:27,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:00:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 8427 states and 27827 transitions. [2021-08-06 15:00:27,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:27,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:27,433 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:27,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:27,634 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 [2021-08-06 15:00:27,634 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1391795877, now seen corresponding path program 17 times [2021-08-06 15:00:27,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:27,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610234536] [2021-08-06 15:00:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:27,635 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:27,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:28,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:28,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:28,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610234536] [2021-08-06 15:00:28,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610234536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:28,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843726209] [2021-08-06 15:00:28,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:00:28,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:28,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:28,010 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) [2021-08-06 15:00:28,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:00:28,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:00:28,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:28,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-06 15:00:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:29,587 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:00:29,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:29,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:00:30,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:30,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843726209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:30,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:30,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:30,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655077063] [2021-08-06 15:00:30,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:30,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:30,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:30,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1103, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:30,108 INFO L87 Difference]: Start difference. First operand 8427 states and 27827 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:34,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:34,034 INFO L93 Difference]: Finished difference Result 33626 states and 111882 transitions. [2021-08-06 15:00:34,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-08-06 15:00:34,035 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:00:34,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:34,122 INFO L225 Difference]: With dead ends: 33626 [2021-08-06 15:00:34,122 INFO L226 Difference]: Without dead ends: 33094 [2021-08-06 15:00:34,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4919 ImplicationChecksByTransitivity, 2972.4ms TimeCoverageRelationStatistics Valid=2189, Invalid=12091, Unknown=0, NotChecked=0, Total=14280 [2021-08-06 15:00:34,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33094 states. [2021-08-06 15:00:34,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33094 to 8851. [2021-08-06 15:00:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8851 states, 8850 states have (on average 3.299322033898305) internal successors, (29199), 8850 states have internal predecessors, (29199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8851 states to 8851 states and 29199 transitions. [2021-08-06 15:00:34,538 INFO L78 Accepts]: Start accepts. Automaton has 8851 states and 29199 transitions. Word has length 44 [2021-08-06 15:00:34,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:34,539 INFO L470 AbstractCegarLoop]: Abstraction has 8851 states and 29199 transitions. [2021-08-06 15:00:34,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:34,539 INFO L276 IsEmpty]: Start isEmpty. Operand 8851 states and 29199 transitions. [2021-08-06 15:00:34,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:34,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:34,556 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:34,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2021-08-06 15:00:34,761 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 [2021-08-06 15:00:34,761 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash 884472071, now seen corresponding path program 18 times [2021-08-06 15:00:34,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:34,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642077298] [2021-08-06 15:00:34,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:34,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:35,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:35,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642077298] [2021-08-06 15:00:35,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642077298] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:35,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474215390] [2021-08-06 15:00:35,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:00:35,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:35,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:35,179 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) [2021-08-06 15:00:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:00:36,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:00:36,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:36,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:00:36,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:36,771 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:36,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 15:00:37,001 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:37,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:00:37,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:37,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474215390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:37,135 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:37,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:37,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54426883] [2021-08-06 15:00:37,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:37,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:37,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:37,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:37,136 INFO L87 Difference]: Start difference. First operand 8851 states and 29199 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:42,208 INFO L93 Difference]: Finished difference Result 42996 states and 143180 transitions. [2021-08-06 15:00:42,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-08-06 15:00:42,208 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:00:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:42,318 INFO L225 Difference]: With dead ends: 42996 [2021-08-06 15:00:42,319 INFO L226 Difference]: Without dead ends: 42106 [2021-08-06 15:00:42,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 3733.5ms TimeCoverageRelationStatistics Valid=2912, Invalid=15994, Unknown=0, NotChecked=0, Total=18906 [2021-08-06 15:00:42,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42106 states. [2021-08-06 15:00:42,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42106 to 8968. [2021-08-06 15:00:42,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8968 states, 8967 states have (on average 3.3004349280695884) internal successors, (29595), 8967 states have internal predecessors, (29595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:42,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8968 states to 8968 states and 29595 transitions. [2021-08-06 15:00:42,699 INFO L78 Accepts]: Start accepts. Automaton has 8968 states and 29595 transitions. Word has length 44 [2021-08-06 15:00:42,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:42,699 INFO L470 AbstractCegarLoop]: Abstraction has 8968 states and 29595 transitions. [2021-08-06 15:00:42,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:42,699 INFO L276 IsEmpty]: Start isEmpty. Operand 8968 states and 29595 transitions. [2021-08-06 15:00:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:42,716 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:42,716 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:42,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:42,919 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 [2021-08-06 15:00:42,919 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:42,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:42,920 INFO L82 PathProgramCache]: Analyzing trace with hash -33606939, now seen corresponding path program 19 times [2021-08-06 15:00:42,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:42,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301967041] [2021-08-06 15:00:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:42,920 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:43,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:43,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:43,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301967041] [2021-08-06 15:00:43,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301967041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:43,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454879069] [2021-08-06 15:00:43,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:00:43,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:43,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:43,370 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) [2021-08-06 15:00:43,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:00:44,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:44,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:00:44,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:44,993 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:44,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 15:00:45,234 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:45,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:00:45,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:45,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454879069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:45,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:45,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:45,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759744203] [2021-08-06 15:00:45,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:45,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:45,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:45,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:45,391 INFO L87 Difference]: Start difference. First operand 8968 states and 29595 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:00:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:51,522 INFO L93 Difference]: Finished difference Result 49086 states and 163096 transitions. [2021-08-06 15:00:51,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-08-06 15:00:51,522 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 15:00:51,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:51,653 INFO L225 Difference]: With dead ends: 49086 [2021-08-06 15:00:51,653 INFO L226 Difference]: Without dead ends: 48036 [2021-08-06 15:00:51,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8907 ImplicationChecksByTransitivity, 4633.1ms TimeCoverageRelationStatistics Valid=3456, Invalid=20414, Unknown=0, NotChecked=0, Total=23870 [2021-08-06 15:00:51,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48036 states. [2021-08-06 15:00:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48036 to 9086. [2021-08-06 15:00:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9086 states, 9085 states have (on average 3.300385250412768) internal successors, (29984), 9085 states have internal predecessors, (29984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:00:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9086 states to 9086 states and 29984 transitions. [2021-08-06 15:00:52,081 INFO L78 Accepts]: Start accepts. Automaton has 9086 states and 29984 transitions. Word has length 44 [2021-08-06 15:00:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:00:52,081 INFO L470 AbstractCegarLoop]: Abstraction has 9086 states and 29984 transitions. [2021-08-06 15:00:52,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:00:52,081 INFO L276 IsEmpty]: Start isEmpty. Operand 9086 states and 29984 transitions. [2021-08-06 15:00:52,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:00:52,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:00:52,099 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:00:52,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:00:52,324 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 [2021-08-06 15:00:52,325 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:00:52,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:00:52,325 INFO L82 PathProgramCache]: Analyzing trace with hash 272930747, now seen corresponding path program 20 times [2021-08-06 15:00:52,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:00:52,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039650762] [2021-08-06 15:00:52,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:00:52,325 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:00:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:00:52,758 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:52,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:00:52,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039650762] [2021-08-06 15:00:52,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039650762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:52,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654739729] [2021-08-06 15:00:52,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:00:52,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:00:52,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:00:52,759 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) [2021-08-06 15:00:52,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:00:53,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:00:53,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:00:53,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:00:53,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:00:54,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:54,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:00:54,737 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:00:54,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:00:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:00:54,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654739729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:00:54,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:00:54,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:00:54,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760207680] [2021-08-06 15:00:54,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:00:54,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:00:54,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:00:54,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:00:54,883 INFO L87 Difference]: Start difference. First operand 9086 states and 29984 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:00:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:00:59,674 INFO L93 Difference]: Finished difference Result 45317 states and 150562 transitions. [2021-08-06 15:00:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-08-06 15:00:59,674 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:00:59,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:00:59,807 INFO L225 Difference]: With dead ends: 45317 [2021-08-06 15:00:59,808 INFO L226 Difference]: Without dead ends: 44497 [2021-08-06 15:00:59,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6509 ImplicationChecksByTransitivity, 3564.4ms TimeCoverageRelationStatistics Valid=2750, Invalid=15610, Unknown=0, NotChecked=0, Total=18360 [2021-08-06 15:00:59,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44497 states. [2021-08-06 15:01:00,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44497 to 9185. [2021-08-06 15:01:00,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9185 states, 9184 states have (on average 3.301502613240418) internal successors, (30321), 9184 states have internal predecessors, (30321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9185 states to 9185 states and 30321 transitions. [2021-08-06 15:01:00,250 INFO L78 Accepts]: Start accepts. Automaton has 9185 states and 30321 transitions. Word has length 44 [2021-08-06 15:01:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:00,250 INFO L470 AbstractCegarLoop]: Abstraction has 9185 states and 30321 transitions. [2021-08-06 15:01:00,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9185 states and 30321 transitions. [2021-08-06 15:01:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:00,268 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:00,268 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:00,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:00,494 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 [2021-08-06 15:01:00,494 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:00,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:00,494 INFO L82 PathProgramCache]: Analyzing trace with hash -645148263, now seen corresponding path program 21 times [2021-08-06 15:01:00,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:00,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089928930] [2021-08-06 15:01:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:00,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:00,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:01,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:01,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089928930] [2021-08-06 15:01:01,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089928930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:01,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124576897] [2021-08-06 15:01:01,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:01:01,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:01,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:01,025 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) [2021-08-06 15:01:01,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:01:02,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:01:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:01:02,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:02,873 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:02,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:03,124 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:01:03,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 24 [2021-08-06 15:01:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:03,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124576897] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:03,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:03,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:03,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198142160] [2021-08-06 15:01:03,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:03,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:03,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:03,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:03,258 INFO L87 Difference]: Start difference. First operand 9185 states and 30321 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:09,473 INFO L93 Difference]: Finished difference Result 50036 states and 166073 transitions. [2021-08-06 15:01:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-08-06 15:01:09,473 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:01:09,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:09,601 INFO L225 Difference]: With dead ends: 50036 [2021-08-06 15:01:09,601 INFO L226 Difference]: Without dead ends: 49116 [2021-08-06 15:01:09,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8692 ImplicationChecksByTransitivity, 4818.5ms TimeCoverageRelationStatistics Valid=3371, Invalid=20191, Unknown=0, NotChecked=0, Total=23562 [2021-08-06 15:01:09,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49116 states. [2021-08-06 15:01:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49116 to 9068. [2021-08-06 15:01:10,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9068 states, 9067 states have (on average 3.2993272306165213) internal successors, (29915), 9067 states have internal predecessors, (29915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9068 states to 9068 states and 29915 transitions. [2021-08-06 15:01:10,027 INFO L78 Accepts]: Start accepts. Automaton has 9068 states and 29915 transitions. Word has length 44 [2021-08-06 15:01:10,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:10,027 INFO L470 AbstractCegarLoop]: Abstraction has 9068 states and 29915 transitions. [2021-08-06 15:01:10,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:10,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9068 states and 29915 transitions. [2021-08-06 15:01:10,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:10,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:10,041 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:10,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-08-06 15:01:10,241 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 [2021-08-06 15:01:10,242 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:10,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:10,242 INFO L82 PathProgramCache]: Analyzing trace with hash 21285545, now seen corresponding path program 22 times [2021-08-06 15:01:10,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:10,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969487123] [2021-08-06 15:01:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:10,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:10,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969487123] [2021-08-06 15:01:10,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969487123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:10,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610252087] [2021-08-06 15:01:10,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:01:10,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:10,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:10,896 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) [2021-08-06 15:01:10,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:01:12,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:01:12,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:12,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:01:12,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:12,953 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:12,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:13,092 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:13,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:13,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610252087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:13,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:13,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:13,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607812068] [2021-08-06 15:01:13,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:13,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:13,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:13,223 INFO L87 Difference]: Start difference. First operand 9068 states and 29915 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:01:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:19,943 INFO L93 Difference]: Finished difference Result 45288 states and 150410 transitions. [2021-08-06 15:01:19,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-08-06 15:01:19,944 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 15:01:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:20,071 INFO L225 Difference]: With dead ends: 45288 [2021-08-06 15:01:20,071 INFO L226 Difference]: Without dead ends: 44078 [2021-08-06 15:01:20,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10989 ImplicationChecksByTransitivity, 5214.0ms TimeCoverageRelationStatistics Valid=3874, Invalid=24856, Unknown=0, NotChecked=0, Total=28730 [2021-08-06 15:01:20,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44078 states. [2021-08-06 15:01:20,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44078 to 9009. [2021-08-06 15:01:20,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9009 states, 9008 states have (on average 3.2961811722912966) internal successors, (29692), 9008 states have internal predecessors, (29692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:20,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9009 states to 9009 states and 29692 transitions. [2021-08-06 15:01:20,496 INFO L78 Accepts]: Start accepts. Automaton has 9009 states and 29692 transitions. Word has length 44 [2021-08-06 15:01:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:20,496 INFO L470 AbstractCegarLoop]: Abstraction has 9009 states and 29692 transitions. [2021-08-06 15:01:20,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:01:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 9009 states and 29692 transitions. [2021-08-06 15:01:20,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:20,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:20,510 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:20,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 15:01:20,711 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 [2021-08-06 15:01:20,711 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:20,712 INFO L82 PathProgramCache]: Analyzing trace with hash -550844311, now seen corresponding path program 23 times [2021-08-06 15:01:20,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:20,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858859697] [2021-08-06 15:01:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:20,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:21,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:21,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858859697] [2021-08-06 15:01:21,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858859697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:21,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374129991] [2021-08-06 15:01:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:01:21,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:21,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:21,211 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) [2021-08-06 15:01:21,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:01:22,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:01:22,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:22,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 15:01:22,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:23,024 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:23,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:23,246 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:23,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:23,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:23,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374129991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:23,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:23,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:23,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215829302] [2021-08-06 15:01:23,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:23,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:23,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:23,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:23,383 INFO L87 Difference]: Start difference. First operand 9009 states and 29692 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:26,483 INFO L93 Difference]: Finished difference Result 23126 states and 76705 transitions. [2021-08-06 15:01:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-06 15:01:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:01:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:26,539 INFO L225 Difference]: With dead ends: 23126 [2021-08-06 15:01:26,540 INFO L226 Difference]: Without dead ends: 22854 [2021-08-06 15:01:26,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2024 ImplicationChecksByTransitivity, 2190.3ms TimeCoverageRelationStatistics Valid=1185, Invalid=6125, Unknown=0, NotChecked=0, Total=7310 [2021-08-06 15:01:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22854 states. [2021-08-06 15:01:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22854 to 8631. [2021-08-06 15:01:26,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 3.2977983777520277) internal successors, (28460), 8630 states have internal predecessors, (28460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 28460 transitions. [2021-08-06 15:01:26,773 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 28460 transitions. Word has length 44 [2021-08-06 15:01:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:26,774 INFO L470 AbstractCegarLoop]: Abstraction has 8631 states and 28460 transitions. [2021-08-06 15:01:26,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:26,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 28460 transitions. [2021-08-06 15:01:26,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:26,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:26,830 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:26,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:27,030 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 [2021-08-06 15:01:27,031 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:27,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:27,031 INFO L82 PathProgramCache]: Analyzing trace with hash -979534053, now seen corresponding path program 24 times [2021-08-06 15:01:27,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:27,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034213207] [2021-08-06 15:01:27,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:27,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:27,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:01:27,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:27,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034213207] [2021-08-06 15:01:27,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034213207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:27,444 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736834453] [2021-08-06 15:01:27,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:01:27,444 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:27,445 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) [2021-08-06 15:01:27,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:01:28,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:01:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:01:28,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:29,435 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:29,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:29,540 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:29,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:29,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:29,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736834453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:29,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:29,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-08-06 15:01:29,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748363844] [2021-08-06 15:01:29,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 15:01:29,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:29,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 15:01:29,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:01:29,676 INFO L87 Difference]: Start difference. First operand 8631 states and 28460 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:01:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:36,764 INFO L93 Difference]: Finished difference Result 36145 states and 120252 transitions. [2021-08-06 15:01:36,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-08-06 15:01:36,764 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-08-06 15:01:36,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:36,855 INFO L225 Difference]: With dead ends: 36145 [2021-08-06 15:01:36,855 INFO L226 Difference]: Without dead ends: 31910 [2021-08-06 15:01:36,856 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12210 ImplicationChecksByTransitivity, 5313.2ms TimeCoverageRelationStatistics Valid=3970, Invalid=27182, Unknown=0, NotChecked=0, Total=31152 [2021-08-06 15:01:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31910 states. [2021-08-06 15:01:37,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31910 to 9069. [2021-08-06 15:01:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9069 states, 9068 states have (on average 3.2930083811204236) internal successors, (29861), 9068 states have internal predecessors, (29861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:37,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9069 states to 9069 states and 29861 transitions. [2021-08-06 15:01:37,153 INFO L78 Accepts]: Start accepts. Automaton has 9069 states and 29861 transitions. Word has length 44 [2021-08-06 15:01:37,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:37,154 INFO L470 AbstractCegarLoop]: Abstraction has 9069 states and 29861 transitions. [2021-08-06 15:01:37,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:01:37,154 INFO L276 IsEmpty]: Start isEmpty. Operand 9069 states and 29861 transitions. [2021-08-06 15:01:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:37,167 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:37,167 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:37,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:01:37,367 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 [2021-08-06 15:01:37,368 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:37,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:37,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1836019791, now seen corresponding path program 25 times [2021-08-06 15:01:37,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:37,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618756136] [2021-08-06 15:01:37,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:37,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:37,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:37,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618756136] [2021-08-06 15:01:37,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618756136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:37,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461894114] [2021-08-06 15:01:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:01:37,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:37,759 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) [2021-08-06 15:01:37,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:01:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:39,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:01:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:39,750 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:39,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:39,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:39,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:40,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461894114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:40,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:40,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:40,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050735048] [2021-08-06 15:01:40,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:40,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:40,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:40,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:40,098 INFO L87 Difference]: Start difference. First operand 9069 states and 29861 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:01:44,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:44,774 INFO L93 Difference]: Finished difference Result 36120 states and 120139 transitions. [2021-08-06 15:01:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-08-06 15:01:44,775 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 15:01:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:44,864 INFO L225 Difference]: With dead ends: 36120 [2021-08-06 15:01:44,865 INFO L226 Difference]: Without dead ends: 35588 [2021-08-06 15:01:44,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 3250.9ms TimeCoverageRelationStatistics Valid=2074, Invalid=11968, Unknown=0, NotChecked=0, Total=14042 [2021-08-06 15:01:44,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35588 states. [2021-08-06 15:01:45,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35588 to 9270. [2021-08-06 15:01:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9270 states, 9269 states have (on average 3.298414068400043) internal successors, (30573), 9269 states have internal predecessors, (30573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9270 states to 9270 states and 30573 transitions. [2021-08-06 15:01:45,294 INFO L78 Accepts]: Start accepts. Automaton has 9270 states and 30573 transitions. Word has length 44 [2021-08-06 15:01:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:45,294 INFO L470 AbstractCegarLoop]: Abstraction has 9270 states and 30573 transitions. [2021-08-06 15:01:45,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:01:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 9270 states and 30573 transitions. [2021-08-06 15:01:45,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:45,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:45,308 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:45,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-06 15:01:45,509 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 [2021-08-06 15:01:45,509 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1328695985, now seen corresponding path program 26 times [2021-08-06 15:01:45,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:45,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45943845] [2021-08-06 15:01:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:45,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:45,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:45,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45943845] [2021-08-06 15:01:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45943845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:45,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714135090] [2021-08-06 15:01:45,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:01:45,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:45,952 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) [2021-08-06 15:01:45,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:01:47,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:01:47,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:47,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:01:47,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:48,047 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:01:48,280 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:48,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714135090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:48,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:48,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:48,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442165356] [2021-08-06 15:01:48,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:48,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:48,411 INFO L87 Difference]: Start difference. First operand 9270 states and 30573 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:01:52,932 INFO L93 Difference]: Finished difference Result 34617 states and 115107 transitions. [2021-08-06 15:01:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-08-06 15:01:52,932 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:01:52,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:01:53,025 INFO L225 Difference]: With dead ends: 34617 [2021-08-06 15:01:53,025 INFO L226 Difference]: Without dead ends: 34217 [2021-08-06 15:01:53,027 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4257 ImplicationChecksByTransitivity, 3374.7ms TimeCoverageRelationStatistics Valid=2087, Invalid=11253, Unknown=0, NotChecked=0, Total=13340 [2021-08-06 15:01:53,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34217 states. [2021-08-06 15:01:53,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34217 to 9330. [2021-08-06 15:01:53,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9330 states, 9329 states have (on average 3.2986386536606283) internal successors, (30773), 9329 states have internal predecessors, (30773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:01:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9330 states to 9330 states and 30773 transitions. [2021-08-06 15:01:53,387 INFO L78 Accepts]: Start accepts. Automaton has 9330 states and 30773 transitions. Word has length 44 [2021-08-06 15:01:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:01:53,387 INFO L470 AbstractCegarLoop]: Abstraction has 9330 states and 30773 transitions. [2021-08-06 15:01:53,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:01:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 9330 states and 30773 transitions. [2021-08-06 15:01:53,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:01:53,402 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:01:53,402 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:01:53,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-06 15:01:53,602 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 [2021-08-06 15:01:53,602 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:01:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:01:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash 410616975, now seen corresponding path program 27 times [2021-08-06 15:01:53,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:01:53,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308708290] [2021-08-06 15:01:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:01:53,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:01:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:01:54,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:54,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:01:54,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308708290] [2021-08-06 15:01:54,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308708290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:54,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040866344] [2021-08-06 15:01:54,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:01:54,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:01:54,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:01:54,057 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) [2021-08-06 15:01:54,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:01:55,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:01:55,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:01:55,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:01:55,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:01:56,160 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:01:56,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 28 [2021-08-06 15:01:56,387 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:01:56,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:01:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:01:56,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040866344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:01:56,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:01:56,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:01:56,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957319303] [2021-08-06 15:01:56,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:01:56,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:01:56,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:01:56,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1123, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:01:56,533 INFO L87 Difference]: Start difference. First operand 9330 states and 30773 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:02:04,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:04,479 INFO L93 Difference]: Finished difference Result 43944 states and 146509 transitions. [2021-08-06 15:02:04,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-08-06 15:02:04,479 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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 44 [2021-08-06 15:02:04,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:04,593 INFO L225 Difference]: With dead ends: 43944 [2021-08-06 15:02:04,593 INFO L226 Difference]: Without dead ends: 43074 [2021-08-06 15:02:04,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9318 ImplicationChecksByTransitivity, 5931.1ms TimeCoverageRelationStatistics Valid=3949, Invalid=22783, Unknown=0, NotChecked=0, Total=26732 [2021-08-06 15:02:04,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43074 states. [2021-08-06 15:02:04,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43074 to 9315. [2021-08-06 15:02:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9315 states, 9314 states have (on average 3.2987975091260466) internal successors, (30725), 9314 states have internal predecessors, (30725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9315 states to 9315 states and 30725 transitions. [2021-08-06 15:02:04,990 INFO L78 Accepts]: Start accepts. Automaton has 9315 states and 30725 transitions. Word has length 44 [2021-08-06 15:02:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 9315 states and 30725 transitions. [2021-08-06 15:02:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 36 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) [2021-08-06 15:02:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 9315 states and 30725 transitions. [2021-08-06 15:02:05,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:02:05,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:05,005 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:05,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:05,206 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 [2021-08-06 15:02:05,206 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash 465509459, now seen corresponding path program 28 times [2021-08-06 15:02:05,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:05,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31168562] [2021-08-06 15:02:05,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:05,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:05,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:05,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31168562] [2021-08-06 15:02:05,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31168562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:05,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894704381] [2021-08-06 15:02:05,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:02:05,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:05,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:05,619 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) [2021-08-06 15:02:05,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:02:07,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:02:07,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:07,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:02:07,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:07,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:07,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:02:07,994 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:07,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:08,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894704381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:08,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:08,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 36 [2021-08-06 15:02:08,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056585363] [2021-08-06 15:02:08,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-06 15:02:08,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:08,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-06 15:02:08,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1115, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:02:08,125 INFO L87 Difference]: Start difference. First operand 9315 states and 30725 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:02:13,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:13,996 INFO L93 Difference]: Finished difference Result 34724 states and 115297 transitions. [2021-08-06 15:02:13,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-08-06 15:02:13,996 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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 44 [2021-08-06 15:02:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:14,081 INFO L225 Difference]: With dead ends: 34724 [2021-08-06 15:02:14,081 INFO L226 Difference]: Without dead ends: 34005 [2021-08-06 15:02:14,082 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6854 ImplicationChecksByTransitivity, 4471.4ms TimeCoverageRelationStatistics Valid=2753, Invalid=17269, Unknown=0, NotChecked=0, Total=20022 [2021-08-06 15:02:14,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34005 states. [2021-08-06 15:02:14,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34005 to 9150. [2021-08-06 15:02:14,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9150 states, 9149 states have (on average 3.2966444420155208) internal successors, (30161), 9149 states have internal predecessors, (30161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:14,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9150 states to 9150 states and 30161 transitions. [2021-08-06 15:02:14,406 INFO L78 Accepts]: Start accepts. Automaton has 9150 states and 30161 transitions. Word has length 44 [2021-08-06 15:02:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:14,406 INFO L470 AbstractCegarLoop]: Abstraction has 9150 states and 30161 transitions. [2021-08-06 15:02:14,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 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) [2021-08-06 15:02:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 9150 states and 30161 transitions. [2021-08-06 15:02:14,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:02:14,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:14,419 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:14,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:14,619 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 [2021-08-06 15:02:14,620 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1257882753, now seen corresponding path program 29 times [2021-08-06 15:02:14,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:14,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145452896] [2021-08-06 15:02:14,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:14,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:02:15,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145452896] [2021-08-06 15:02:15,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145452896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:15,050 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935589340] [2021-08-06 15:02:15,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:02:15,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:15,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:15,051 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) [2021-08-06 15:02:15,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:02:16,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:02:16,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:16,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:02:16,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:17,405 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:17,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:02:17,515 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:17,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:17,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935589340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:17,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:17,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-08-06 15:02:17,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584995186] [2021-08-06 15:02:17,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 15:02:17,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:17,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 15:02:17,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:02:17,647 INFO L87 Difference]: Start difference. First operand 9150 states and 30161 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:02:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:23,740 INFO L93 Difference]: Finished difference Result 32817 states and 109404 transitions. [2021-08-06 15:02:23,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-08-06 15:02:23,740 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-08-06 15:02:23,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:23,825 INFO L225 Difference]: With dead ends: 32817 [2021-08-06 15:02:23,825 INFO L226 Difference]: Without dead ends: 28992 [2021-08-06 15:02:23,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10022 ImplicationChecksByTransitivity, 4499.2ms TimeCoverageRelationStatistics Valid=3473, Invalid=22609, Unknown=0, NotChecked=0, Total=26082 [2021-08-06 15:02:23,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28992 states. [2021-08-06 15:02:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28992 to 9490. [2021-08-06 15:02:24,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9490 states, 9489 states have (on average 3.2923384972072927) internal successors, (31241), 9489 states have internal predecessors, (31241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:24,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9490 states to 9490 states and 31241 transitions. [2021-08-06 15:02:24,117 INFO L78 Accepts]: Start accepts. Automaton has 9490 states and 31241 transitions. Word has length 44 [2021-08-06 15:02:24,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:24,117 INFO L470 AbstractCegarLoop]: Abstraction has 9490 states and 31241 transitions. [2021-08-06 15:02:24,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:02:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 9490 states and 31241 transitions. [2021-08-06 15:02:24,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-06 15:02:24,131 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:24,131 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:24,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 15:02:24,332 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 [2021-08-06 15:02:24,332 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:24,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1895274763, now seen corresponding path program 30 times [2021-08-06 15:02:24,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:24,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148287482] [2021-08-06 15:02:24,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:24,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:24,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:24,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:02:24,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:24,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148287482] [2021-08-06 15:02:24,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148287482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:24,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737051043] [2021-08-06 15:02:24,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:02:24,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:24,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:24,851 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) [2021-08-06 15:02:24,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:02:26,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:02:26,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:26,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 15:02:26,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:27,211 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:27,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:02:27,372 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:27,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:27,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737051043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:27,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:27,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 35 [2021-08-06 15:02:27,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223587769] [2021-08-06 15:02:27,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-06 15:02:27,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-06 15:02:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:02:27,506 INFO L87 Difference]: Start difference. First operand 9490 states and 31241 transitions. Second operand has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:02:33,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:33,525 INFO L93 Difference]: Finished difference Result 36305 states and 121088 transitions. [2021-08-06 15:02:33,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-08-06 15:02:33,525 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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 44 [2021-08-06 15:02:33,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:33,613 INFO L225 Difference]: With dead ends: 36305 [2021-08-06 15:02:33,613 INFO L226 Difference]: Without dead ends: 33597 [2021-08-06 15:02:33,615 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10207 ImplicationChecksByTransitivity, 4857.4ms TimeCoverageRelationStatistics Valid=3565, Invalid=23167, Unknown=0, NotChecked=0, Total=26732 [2021-08-06 15:02:33,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33597 states. [2021-08-06 15:02:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33597 to 9560. [2021-08-06 15:02:33,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9560 states, 9559 states have (on average 3.2892561983471076) internal successors, (31442), 9559 states have internal predecessors, (31442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:33,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9560 states to 9560 states and 31442 transitions. [2021-08-06 15:02:33,987 INFO L78 Accepts]: Start accepts. Automaton has 9560 states and 31442 transitions. Word has length 44 [2021-08-06 15:02:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:33,987 INFO L470 AbstractCegarLoop]: Abstraction has 9560 states and 31442 transitions. [2021-08-06 15:02:33,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 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) [2021-08-06 15:02:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 9560 states and 31442 transitions. [2021-08-06 15:02:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:02:34,001 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:34,001 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:34,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:34,201 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 [2021-08-06 15:02:34,202 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:34,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:34,202 INFO L82 PathProgramCache]: Analyzing trace with hash -918243745, now seen corresponding path program 31 times [2021-08-06 15:02:34,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:34,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006401633] [2021-08-06 15:02:34,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:34,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:34,244 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:34,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:34,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006401633] [2021-08-06 15:02:34,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006401633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:34,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901026548] [2021-08-06 15:02:34,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:02:34,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:34,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:34,249 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) [2021-08-06 15:02:34,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:02:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:02:35,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:02:36,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901026548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:36,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:36,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 15:02:36,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947817600] [2021-08-06 15:02:36,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:02:36,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:36,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:02:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:02:36,097 INFO L87 Difference]: Start difference. First operand 9560 states and 31442 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-08-06 15:02:36,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:36,157 INFO L93 Difference]: Finished difference Result 14489 states and 47759 transitions. [2021-08-06 15:02:36,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:02:36,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 47 [2021-08-06 15:02:36,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:36,193 INFO L225 Difference]: With dead ends: 14489 [2021-08-06 15:02:36,194 INFO L226 Difference]: Without dead ends: 14285 [2021-08-06 15:02:36,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:02:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14285 states. [2021-08-06 15:02:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14285 to 11058. [2021-08-06 15:02:36,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 3.319164330288505) internal successors, (36700), 11057 states have internal predecessors, (36700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:36,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 36700 transitions. [2021-08-06 15:02:36,441 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 36700 transitions. Word has length 47 [2021-08-06 15:02:36,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:36,441 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 36700 transitions. [2021-08-06 15:02:36,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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) [2021-08-06 15:02:36,441 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 36700 transitions. [2021-08-06 15:02:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:02:36,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:36,459 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:36,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 15:02:36,659 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 [2021-08-06 15:02:36,659 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:36,660 INFO L82 PathProgramCache]: Analyzing trace with hash -147621764, now seen corresponding path program 32 times [2021-08-06 15:02:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:36,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864740351] [2021-08-06 15:02:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:36,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:37,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:37,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864740351] [2021-08-06 15:02:37,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864740351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:37,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022737748] [2021-08-06 15:02:37,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:02:37,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:37,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:37,050 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) [2021-08-06 15:02:37,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:02:38,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:02:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:38,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:02:38,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:39,532 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:39,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 15:02:39,762 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:39,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:39,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022737748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:39,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:39,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-06 15:02:39,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425741427] [2021-08-06 15:02:39,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:02:39,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:39,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:02:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1253, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:02:39,891 INFO L87 Difference]: Start difference. First operand 11058 states and 36700 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:02:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:42,284 INFO L93 Difference]: Finished difference Result 26717 states and 89025 transitions. [2021-08-06 15:02:42,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:02:42,289 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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 47 [2021-08-06 15:02:42,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:42,368 INFO L225 Difference]: With dead ends: 26717 [2021-08-06 15:02:42,368 INFO L226 Difference]: Without dead ends: 26417 [2021-08-06 15:02:42,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 1833.2ms TimeCoverageRelationStatistics Valid=858, Invalid=4994, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:02:42,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26417 states. [2021-08-06 15:02:42,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26417 to 11219. [2021-08-06 15:02:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11219 states, 11218 states have (on average 3.3185059725441257) internal successors, (37227), 11218 states have internal predecessors, (37227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11219 states to 11219 states and 37227 transitions. [2021-08-06 15:02:42,655 INFO L78 Accepts]: Start accepts. Automaton has 11219 states and 37227 transitions. Word has length 47 [2021-08-06 15:02:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:42,656 INFO L470 AbstractCegarLoop]: Abstraction has 11219 states and 37227 transitions. [2021-08-06 15:02:42,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:02:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 11219 states and 37227 transitions. [2021-08-06 15:02:42,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:02:42,674 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:42,674 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:42,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-06 15:02:42,876 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 [2021-08-06 15:02:42,877 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:42,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:42,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1065700774, now seen corresponding path program 33 times [2021-08-06 15:02:42,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:42,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843164194] [2021-08-06 15:02:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:42,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:43,334 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:43,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:43,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843164194] [2021-08-06 15:02:43,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843164194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:43,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971061603] [2021-08-06 15:02:43,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:02:43,335 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:43,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:43,335 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) [2021-08-06 15:02:43,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:02:45,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:02:45,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:45,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 15:02:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:45,874 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:45,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 15:02:46,094 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:46,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:46,237 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:46,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971061603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:46,237 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:46,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 39 [2021-08-06 15:02:46,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013703227] [2021-08-06 15:02:46,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-06 15:02:46,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:46,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-06 15:02:46,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1321, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:02:46,238 INFO L87 Difference]: Start difference. First operand 11219 states and 37227 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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) [2021-08-06 15:02:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:49,290 INFO L93 Difference]: Finished difference Result 32527 states and 108078 transitions. [2021-08-06 15:02:49,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-06 15:02:49,290 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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 47 [2021-08-06 15:02:49,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:49,384 INFO L225 Difference]: With dead ends: 32527 [2021-08-06 15:02:49,384 INFO L226 Difference]: Without dead ends: 32227 [2021-08-06 15:02:49,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2636 ImplicationChecksByTransitivity, 2526.5ms TimeCoverageRelationStatistics Valid=1270, Invalid=7660, Unknown=0, NotChecked=0, Total=8930 [2021-08-06 15:02:49,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32227 states. [2021-08-06 15:02:49,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32227 to 11058. [2021-08-06 15:02:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11058 states, 11057 states have (on average 3.319164330288505) internal successors, (36700), 11057 states have internal predecessors, (36700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:49,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11058 states to 11058 states and 36700 transitions. [2021-08-06 15:02:49,733 INFO L78 Accepts]: Start accepts. Automaton has 11058 states and 36700 transitions. Word has length 47 [2021-08-06 15:02:49,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:49,733 INFO L470 AbstractCegarLoop]: Abstraction has 11058 states and 36700 transitions. [2021-08-06 15:02:49,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 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) [2021-08-06 15:02:49,734 INFO L276 IsEmpty]: Start isEmpty. Operand 11058 states and 36700 transitions. [2021-08-06 15:02:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:02:49,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:49,750 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:49,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:49,951 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 [2021-08-06 15:02:49,951 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:49,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:49,952 INFO L82 PathProgramCache]: Analyzing trace with hash -668341022, now seen corresponding path program 34 times [2021-08-06 15:02:49,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:49,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479382793] [2021-08-06 15:02:49,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:49,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:50,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:50,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479382793] [2021-08-06 15:02:50,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479382793] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:50,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338548545] [2021-08-06 15:02:50,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:02:50,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:50,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:50,382 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) [2021-08-06 15:02:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:02:52,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:02:52,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:52,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-06 15:02:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:52,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:52,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-08-06 15:02:53,133 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:53,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:53,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338548545] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:53,264 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:53,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-06 15:02:53,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793447928] [2021-08-06 15:02:53,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:02:53,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:02:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:02:53,265 INFO L87 Difference]: Start difference. First operand 11058 states and 36700 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:02:55,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:02:55,492 INFO L93 Difference]: Finished difference Result 26496 states and 88304 transitions. [2021-08-06 15:02:55,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:02:55,493 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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 47 [2021-08-06 15:02:55,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:02:55,557 INFO L225 Difference]: With dead ends: 26496 [2021-08-06 15:02:55,557 INFO L226 Difference]: Without dead ends: 26196 [2021-08-06 15:02:55,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1619 ImplicationChecksByTransitivity, 1815.0ms TimeCoverageRelationStatistics Valid=863, Invalid=4989, Unknown=0, NotChecked=0, Total=5852 [2021-08-06 15:02:55,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26196 states. [2021-08-06 15:02:55,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26196 to 11069. [2021-08-06 15:02:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11069 states, 11068 states have (on average 3.319298879653054) internal successors, (36738), 11068 states have internal predecessors, (36738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:02:55,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11069 states to 11069 states and 36738 transitions. [2021-08-06 15:02:55,840 INFO L78 Accepts]: Start accepts. Automaton has 11069 states and 36738 transitions. Word has length 47 [2021-08-06 15:02:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:02:55,841 INFO L470 AbstractCegarLoop]: Abstraction has 11069 states and 36738 transitions. [2021-08-06 15:02:55,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:02:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 11069 states and 36738 transitions. [2021-08-06 15:02:55,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-06 15:02:55,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:02:55,857 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:02:55,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:02:56,057 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 [2021-08-06 15:02:56,058 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:02:56,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:02:56,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1586420032, now seen corresponding path program 35 times [2021-08-06 15:02:56,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:02:56,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178227562] [2021-08-06 15:02:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:02:56,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:02:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:02:56,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:56,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:02:56,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178227562] [2021-08-06 15:02:56,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178227562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:56,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585437651] [2021-08-06 15:02:56,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:02:56,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:02:56,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:02:56,472 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) [2021-08-06 15:02:56,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:02:58,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:02:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:02:58,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 15:02:58,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:02:59,081 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:59,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 19 [2021-08-06 15:02:59,327 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:02:59,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:02:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:02:59,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585437651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:02:59,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:02:59,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-06 15:02:59,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155085684] [2021-08-06 15:02:59,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:02:59,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:02:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:02:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:02:59,461 INFO L87 Difference]: Start difference. First operand 11069 states and 36738 transitions. Second operand has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:03:02,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:02,600 INFO L93 Difference]: Finished difference Result 31880 states and 105884 transitions. [2021-08-06 15:03:02,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-06 15:03:02,601 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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 47 [2021-08-06 15:03:02,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:02,733 INFO L225 Difference]: With dead ends: 31880 [2021-08-06 15:03:02,733 INFO L226 Difference]: Without dead ends: 31580 [2021-08-06 15:03:02,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 2317.3ms TimeCoverageRelationStatistics Valid=1225, Invalid=7147, Unknown=0, NotChecked=0, Total=8372 [2021-08-06 15:03:02,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31580 states. [2021-08-06 15:03:02,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31580 to 10908. [2021-08-06 15:03:02,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10908 states, 10907 states have (on average 3.319977995782525) internal successors, (36211), 10907 states have internal predecessors, (36211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10908 states to 10908 states and 36211 transitions. [2021-08-06 15:03:03,012 INFO L78 Accepts]: Start accepts. Automaton has 10908 states and 36211 transitions. Word has length 47 [2021-08-06 15:03:03,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:03,012 INFO L470 AbstractCegarLoop]: Abstraction has 10908 states and 36211 transitions. [2021-08-06 15:03:03,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0789473684210527) internal successors, (79), 38 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) [2021-08-06 15:03:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10908 states and 36211 transitions. [2021-08-06 15:03:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:03,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:03,028 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:03,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:03:03,228 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 [2021-08-06 15:03:03,229 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:03:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:03,229 INFO L82 PathProgramCache]: Analyzing trace with hash 43908228, now seen corresponding path program 36 times [2021-08-06 15:03:03,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:03,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120994852] [2021-08-06 15:03:03,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:03,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:03:03,268 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:03,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120994852] [2021-08-06 15:03:03,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120994852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:03,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127778642] [2021-08-06 15:03:03,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:03:03,269 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:03,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:03,270 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) [2021-08-06 15:03:03,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:03:05,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:03:05,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:05,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:03:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:03:05,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127778642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:05,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:05,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-08-06 15:03:05,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672231966] [2021-08-06 15:03:05,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:03:05,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:05,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:03:05,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:03:05,455 INFO L87 Difference]: Start difference. First operand 10908 states and 36211 transitions. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-08-06 15:03:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:05,526 INFO L93 Difference]: Finished difference Result 18552 states and 61815 transitions. [2021-08-06 15:03:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 15:03:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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 51 [2021-08-06 15:03:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:05,566 INFO L225 Difference]: With dead ends: 18552 [2021-08-06 15:03:05,566 INFO L226 Difference]: Without dead ends: 17918 [2021-08-06 15:03:05,566 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:03:05,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17918 states. [2021-08-06 15:03:05,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17918 to 12843. [2021-08-06 15:03:05,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12843 states, 12842 states have (on average 3.363339043762654) internal successors, (43192), 12842 states have internal predecessors, (43192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12843 states to 12843 states and 43192 transitions. [2021-08-06 15:03:05,808 INFO L78 Accepts]: Start accepts. Automaton has 12843 states and 43192 transitions. Word has length 51 [2021-08-06 15:03:05,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:05,808 INFO L470 AbstractCegarLoop]: Abstraction has 12843 states and 43192 transitions. [2021-08-06 15:03:05,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2021-08-06 15:03:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 12843 states and 43192 transitions. [2021-08-06 15:03:05,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:05,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:05,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:05,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:03:06,031 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 [2021-08-06 15:03:06,031 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:03:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:06,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1169057997, now seen corresponding path program 37 times [2021-08-06 15:03:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:06,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040608962] [2021-08-06 15:03:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:06,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:06,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:06,539 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:06,539 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:06,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040608962] [2021-08-06 15:03:06,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040608962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:06,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568076898] [2021-08-06 15:03:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:03:06,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:06,545 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) [2021-08-06 15:03:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:03:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:08,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:03:08,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:09,278 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:03:09,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-08-06 15:03:09,623 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:03:09,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:03:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:09,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568076898] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:09,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:09,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-06 15:03:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92938311] [2021-08-06 15:03:09,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:03:09,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:03:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:03:09,754 INFO L87 Difference]: Start difference. First operand 12843 states and 43192 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:18,180 INFO L93 Difference]: Finished difference Result 82464 states and 281162 transitions. [2021-08-06 15:03:18,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-08-06 15:03:18,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:18,444 INFO L225 Difference]: With dead ends: 82464 [2021-08-06 15:03:18,445 INFO L226 Difference]: Without dead ends: 80570 [2021-08-06 15:03:18,446 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17614 ImplicationChecksByTransitivity, 6005.2ms TimeCoverageRelationStatistics Valid=5003, Invalid=39307, Unknown=0, NotChecked=0, Total=44310 [2021-08-06 15:03:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80570 states. [2021-08-06 15:03:19,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80570 to 13455. [2021-08-06 15:03:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13455 states, 13454 states have (on average 3.3787721123829346) internal successors, (45458), 13454 states have internal predecessors, (45458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:19,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13455 states to 13455 states and 45458 transitions. [2021-08-06 15:03:19,589 INFO L78 Accepts]: Start accepts. Automaton has 13455 states and 45458 transitions. Word has length 51 [2021-08-06 15:03:19,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:19,590 INFO L470 AbstractCegarLoop]: Abstraction has 13455 states and 45458 transitions. [2021-08-06 15:03:19,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 13455 states and 45458 transitions. [2021-08-06 15:03:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-06 15:03:19,618 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:19,618 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:19,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:03:19,843 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 [2021-08-06 15:03:19,843 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:03:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:19,844 INFO L82 PathProgramCache]: Analyzing trace with hash -112328785, now seen corresponding path program 38 times [2021-08-06 15:03:19,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:19,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618346250] [2021-08-06 15:03:19,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:19,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:19,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:20,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618346250] [2021-08-06 15:03:20,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618346250] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:20,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668927425] [2021-08-06 15:03:20,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:03:20,426 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:20,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:20,427 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) [2021-08-06 15:03:20,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:03:22,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:03:22,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:22,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 15:03:22,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:23,211 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-06 15:03:23,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2021-08-06 15:03:23,638 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:03:23,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-08-06 15:03:23,770 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:23,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668927425] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:23,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:23,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 38 [2021-08-06 15:03:23,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297095339] [2021-08-06 15:03:23,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-06 15:03:23,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:23,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-06 15:03:23,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:03:23,771 INFO L87 Difference]: Start difference. First operand 13455 states and 45458 transitions. Second operand has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:31,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:31,842 INFO L93 Difference]: Finished difference Result 81109 states and 277768 transitions. [2021-08-06 15:03:31,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2021-08-06 15:03:31,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-06 15:03:31,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:32,074 INFO L225 Difference]: With dead ends: 81109 [2021-08-06 15:03:32,074 INFO L226 Difference]: Without dead ends: 79073 [2021-08-06 15:03:32,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15383 ImplicationChecksByTransitivity, 5699.7ms TimeCoverageRelationStatistics Valid=4605, Invalid=34797, Unknown=0, NotChecked=0, Total=39402 [2021-08-06 15:03:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79073 states. [2021-08-06 15:03:32,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79073 to 13965. [2021-08-06 15:03:32,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13965 states, 13964 states have (on average 3.384918361501003) internal successors, (47267), 13964 states have internal predecessors, (47267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:32,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13965 states to 13965 states and 47267 transitions. [2021-08-06 15:03:32,794 INFO L78 Accepts]: Start accepts. Automaton has 13965 states and 47267 transitions. Word has length 51 [2021-08-06 15:03:32,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:32,794 INFO L470 AbstractCegarLoop]: Abstraction has 13965 states and 47267 transitions. [2021-08-06 15:03:32,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:32,795 INFO L276 IsEmpty]: Start isEmpty. Operand 13965 states and 47267 transitions. [2021-08-06 15:03:32,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:03:32,816 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:32,816 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:32,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:03:33,021 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 [2021-08-06 15:03:33,021 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:03:33,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:33,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1900507095, now seen corresponding path program 39 times [2021-08-06 15:03:33,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:33,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051489143] [2021-08-06 15:03:33,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:33,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:33,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-06 15:03:34,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:34,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051489143] [2021-08-06 15:03:34,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051489143] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:34,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225438433] [2021-08-06 15:03:34,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:03:34,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:34,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:34,108 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) [2021-08-06 15:03:34,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:03:36,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:03:36,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:36,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 15:03:36,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:37,698 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:03:37,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:03:37,862 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 15:03:37,862 INFO L388 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 48 treesize of output 29 [2021-08-06 15:03:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:38,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225438433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:38,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:38,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 42 [2021-08-06 15:03:38,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638775755] [2021-08-06 15:03:38,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-06 15:03:38,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-06 15:03:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1547, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:03:38,036 INFO L87 Difference]: Start difference. First operand 13965 states and 47267 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:51,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:03:51,185 INFO L93 Difference]: Finished difference Result 91171 states and 310443 transitions. [2021-08-06 15:03:51,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2021-08-06 15:03:51,186 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:03:51,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:03:51,455 INFO L225 Difference]: With dead ends: 91171 [2021-08-06 15:03:51,455 INFO L226 Difference]: Without dead ends: 86545 [2021-08-06 15:03:51,457 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 34 SyntacticMatches, 7 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22290 ImplicationChecksByTransitivity, 10405.3ms TimeCoverageRelationStatistics Valid=6186, Invalid=50220, Unknown=0, NotChecked=0, Total=56406 [2021-08-06 15:03:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86545 states. [2021-08-06 15:03:52,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86545 to 14869. [2021-08-06 15:03:52,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14869 states, 14868 states have (on average 3.371334409470003) internal successors, (50125), 14868 states have internal predecessors, (50125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:52,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14869 states to 14869 states and 50125 transitions. [2021-08-06 15:03:52,642 INFO L78 Accepts]: Start accepts. Automaton has 14869 states and 50125 transitions. Word has length 54 [2021-08-06 15:03:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:03:52,642 INFO L470 AbstractCegarLoop]: Abstraction has 14869 states and 50125 transitions. [2021-08-06 15:03:52,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 42 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:03:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 14869 states and 50125 transitions. [2021-08-06 15:03:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:03:52,666 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:03:52,666 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:03:52,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-06 15:03:52,867 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 [2021-08-06 15:03:52,867 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:03:52,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:03:52,868 INFO L82 PathProgramCache]: Analyzing trace with hash 169637525, now seen corresponding path program 40 times [2021-08-06 15:03:52,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:03:52,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837505707] [2021-08-06 15:03:52,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:03:52,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:03:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:03:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:03:53,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:03:53,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837505707] [2021-08-06 15:03:53,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837505707] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:53,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372102721] [2021-08-06 15:03:53,690 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:03:53,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:03:53,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:03:53,691 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) [2021-08-06 15:03:53,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:03:55,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:03:55,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:03:55,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:03:55,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:03:57,099 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:03:57,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 29 [2021-08-06 15:03:57,381 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:03:57,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:03:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:03:57,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372102721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:03:57,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:03:57,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:03:57,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704877577] [2021-08-06 15:03:57,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:03:57,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:03:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:03:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1622, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:03:57,523 INFO L87 Difference]: Start difference. First operand 14869 states and 50125 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:08,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:08,297 INFO L93 Difference]: Finished difference Result 92248 states and 311427 transitions. [2021-08-06 15:04:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2021-08-06 15:04:08,297 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:04:08,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:08,577 INFO L225 Difference]: With dead ends: 92248 [2021-08-06 15:04:08,577 INFO L226 Difference]: Without dead ends: 91398 [2021-08-06 15:04:08,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19894 ImplicationChecksByTransitivity, 8464.4ms TimeCoverageRelationStatistics Valid=5038, Invalid=45812, Unknown=0, NotChecked=0, Total=50850 [2021-08-06 15:04:08,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91398 states. [2021-08-06 15:04:09,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91398 to 15733. [2021-08-06 15:04:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15733 states, 15732 states have (on average 3.364607170099161) internal successors, (52932), 15732 states have internal predecessors, (52932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:09,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15733 states to 15733 states and 52932 transitions. [2021-08-06 15:04:09,692 INFO L78 Accepts]: Start accepts. Automaton has 15733 states and 52932 transitions. Word has length 54 [2021-08-06 15:04:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:09,692 INFO L470 AbstractCegarLoop]: Abstraction has 15733 states and 52932 transitions. [2021-08-06 15:04:09,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 15733 states and 52932 transitions. [2021-08-06 15:04:09,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:04:09,718 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:09,718 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:09,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 15:04:09,918 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 [2021-08-06 15:04:09,918 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:04:09,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:09,919 INFO L82 PathProgramCache]: Analyzing trace with hash -337686281, now seen corresponding path program 41 times [2021-08-06 15:04:09,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:09,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122265107] [2021-08-06 15:04:09,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:10,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:10,664 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:04:10,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:10,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122265107] [2021-08-06 15:04:10,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122265107] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:10,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387832511] [2021-08-06 15:04:10,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:04:10,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:10,668 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) [2021-08-06 15:04:10,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:04:13,012 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:04:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:04:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:14,446 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 15:04:14,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 45 [2021-08-06 15:04:14,856 INFO L354 Elim1Store]: treesize reduction 151, result has 6.2 percent of original size [2021-08-06 15:04:14,856 INFO L388 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 46 treesize of output 35 [2021-08-06 15:04:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:15,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387832511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:15,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:15,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:04:15,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122770476] [2021-08-06 15:04:15,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:04:15,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:15,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:04:15,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:04:15,002 INFO L87 Difference]: Start difference. First operand 15733 states and 52932 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:28,490 INFO L93 Difference]: Finished difference Result 101540 states and 342524 transitions. [2021-08-06 15:04:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2021-08-06 15:04:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:04:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:29,246 INFO L225 Difference]: With dead ends: 101540 [2021-08-06 15:04:29,246 INFO L226 Difference]: Without dead ends: 100650 [2021-08-06 15:04:29,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25105 ImplicationChecksByTransitivity, 10893.5ms TimeCoverageRelationStatistics Valid=6466, Invalid=56284, Unknown=0, NotChecked=0, Total=62750 [2021-08-06 15:04:29,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100650 states. [2021-08-06 15:04:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100650 to 15816. [2021-08-06 15:04:30,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15816 states, 15815 states have (on average 3.3652861207714198) internal successors, (53222), 15815 states have internal predecessors, (53222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:30,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15816 states to 15816 states and 53222 transitions. [2021-08-06 15:04:30,337 INFO L78 Accepts]: Start accepts. Automaton has 15816 states and 53222 transitions. Word has length 54 [2021-08-06 15:04:30,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:30,337 INFO L470 AbstractCegarLoop]: Abstraction has 15816 states and 53222 transitions. [2021-08-06 15:04:30,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 15816 states and 53222 transitions. [2021-08-06 15:04:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:04:30,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:30,476 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:30,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 15:04:30,688 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 [2021-08-06 15:04:30,689 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:04:30,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:30,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1255765291, now seen corresponding path program 42 times [2021-08-06 15:04:30,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:30,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847823264] [2021-08-06 15:04:30,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:30,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:30,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:31,442 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:04:31,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:31,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847823264] [2021-08-06 15:04:31,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847823264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:31,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389923594] [2021-08-06 15:04:31,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:04:31,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:31,443 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) [2021-08-06 15:04:31,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:04:33,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:04:33,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:04:33,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:04:33,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:35,065 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:04:35,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:04:35,353 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:04:35,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:04:35,498 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:35,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389923594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:35,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:35,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:04:35,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572028420] [2021-08-06 15:04:35,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:04:35,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:35,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:04:35,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1624, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:04:35,499 INFO L87 Difference]: Start difference. First operand 15816 states and 53222 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:04:51,854 INFO L93 Difference]: Finished difference Result 125838 states and 427025 transitions. [2021-08-06 15:04:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-08-06 15:04:51,855 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:04:51,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:04:52,268 INFO L225 Difference]: With dead ends: 125838 [2021-08-06 15:04:52,268 INFO L226 Difference]: Without dead ends: 122268 [2021-08-06 15:04:52,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35074 ImplicationChecksByTransitivity, 12966.4ms TimeCoverageRelationStatistics Valid=8395, Invalid=75415, Unknown=0, NotChecked=0, Total=83810 [2021-08-06 15:04:52,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122268 states. [2021-08-06 15:04:53,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122268 to 17690. [2021-08-06 15:04:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17690 states, 17689 states have (on average 3.3524789417151903) internal successors, (59302), 17689 states have internal predecessors, (59302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17690 states to 17690 states and 59302 transitions. [2021-08-06 15:04:53,426 INFO L78 Accepts]: Start accepts. Automaton has 17690 states and 59302 transitions. Word has length 54 [2021-08-06 15:04:53,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:04:53,426 INFO L470 AbstractCegarLoop]: Abstraction has 17690 states and 59302 transitions. [2021-08-06 15:04:53,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:04:53,426 INFO L276 IsEmpty]: Start isEmpty. Operand 17690 states and 59302 transitions. [2021-08-06 15:04:53,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:04:53,453 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:04:53,453 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:04:53,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:04:53,656 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 [2021-08-06 15:04:53,657 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:04:53,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:04:53,657 INFO L82 PathProgramCache]: Analyzing trace with hash -949227605, now seen corresponding path program 43 times [2021-08-06 15:04:53,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:04:53,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645986293] [2021-08-06 15:04:53,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:04:53,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:04:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:54,958 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:04:54,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:04:54,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645986293] [2021-08-06 15:04:54,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645986293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:54,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5221539] [2021-08-06 15:04:54,958 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:04:54,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:04:54,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:04:54,959 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) [2021-08-06 15:04:54,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:04:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:04:57,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:04:57,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:04:58,877 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:04:58,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:04:59,107 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:04:59,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:04:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:04:59,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5221539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:04:59,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:04:59,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:04:59,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091066416] [2021-08-06 15:04:59,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:04:59,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:04:59,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:04:59,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:04:59,251 INFO L87 Difference]: Start difference. First operand 17690 states and 59302 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:11,739 INFO L93 Difference]: Finished difference Result 101107 states and 340880 transitions. [2021-08-06 15:05:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-08-06 15:05:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:05:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:12,062 INFO L225 Difference]: With dead ends: 101107 [2021-08-06 15:05:12,062 INFO L226 Difference]: Without dead ends: 100277 [2021-08-06 15:05:12,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22988 ImplicationChecksByTransitivity, 9953.3ms TimeCoverageRelationStatistics Valid=5801, Invalid=52039, Unknown=0, NotChecked=0, Total=57840 [2021-08-06 15:05:12,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100277 states. [2021-08-06 15:05:13,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100277 to 17833. [2021-08-06 15:05:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 3.353017048003589) internal successors, (59791), 17832 states have internal predecessors, (59791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:13,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 59791 transitions. [2021-08-06 15:05:13,403 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 59791 transitions. Word has length 54 [2021-08-06 15:05:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:13,403 INFO L470 AbstractCegarLoop]: Abstraction has 17833 states and 59791 transitions. [2021-08-06 15:05:13,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 59791 transitions. [2021-08-06 15:05:13,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:05:13,431 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:13,431 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:13,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-06 15:05:13,632 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 [2021-08-06 15:05:13,633 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:05:13,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:13,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1867306615, now seen corresponding path program 44 times [2021-08-06 15:05:13,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:13,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649347970] [2021-08-06 15:05:13,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:13,634 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:14,555 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:05:14,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:14,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649347970] [2021-08-06 15:05:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649347970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:14,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547133256] [2021-08-06 15:05:14,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:05:14,556 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:14,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:14,557 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) [2021-08-06 15:05:14,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:05:17,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:05:17,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:17,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:05:17,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:18,559 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:05:18,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:05:18,783 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:05:18,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:05:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:18,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547133256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:18,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:18,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:05:18,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374797660] [2021-08-06 15:05:18,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:05:18,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:18,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:05:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1623, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:05:18,925 INFO L87 Difference]: Start difference. First operand 17833 states and 59791 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:33,611 INFO L93 Difference]: Finished difference Result 107704 states and 362679 transitions. [2021-08-06 15:05:33,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 240 states. [2021-08-06 15:05:33,611 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:05:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:33,949 INFO L225 Difference]: With dead ends: 107704 [2021-08-06 15:05:33,949 INFO L226 Difference]: Without dead ends: 106834 [2021-08-06 15:05:33,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32263 ImplicationChecksByTransitivity, 12126.1ms TimeCoverageRelationStatistics Valid=7783, Invalid=69779, Unknown=0, NotChecked=0, Total=77562 [2021-08-06 15:05:34,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106834 states. [2021-08-06 15:05:35,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106834 to 17204. [2021-08-06 15:05:35,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 3.3515084578271233) internal successors, (57656), 17203 states have internal predecessors, (57656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 57656 transitions. [2021-08-06 15:05:35,403 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 57656 transitions. Word has length 54 [2021-08-06 15:05:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:35,403 INFO L470 AbstractCegarLoop]: Abstraction has 17204 states and 57656 transitions. [2021-08-06 15:05:35,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 57656 transitions. [2021-08-06 15:05:35,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:05:35,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:35,429 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:35,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 15:05:35,640 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 [2021-08-06 15:05:35,640 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:05:35,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:35,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1200872807, now seen corresponding path program 45 times [2021-08-06 15:05:35,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:35,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968630448] [2021-08-06 15:05:35,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:35,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-06 15:05:36,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:36,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968630448] [2021-08-06 15:05:36,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968630448] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:36,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118835397] [2021-08-06 15:05:36,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:05:36,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:36,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:36,220 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) [2021-08-06 15:05:36,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:05:39,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:05:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:05:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:40,469 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:05:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:05:40,638 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-06 15:05:40,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-08-06 15:05:40,777 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118835397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:40,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:40,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:05:40,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027278869] [2021-08-06 15:05:40,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:05:40,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:40,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:05:40,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1625, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:05:40,778 INFO L87 Difference]: Start difference. First operand 17204 states and 57656 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:05:52,330 INFO L93 Difference]: Finished difference Result 86803 states and 292764 transitions. [2021-08-06 15:05:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-08-06 15:05:52,330 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:05:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:05:52,584 INFO L225 Difference]: With dead ends: 86803 [2021-08-06 15:05:52,584 INFO L226 Difference]: Without dead ends: 85593 [2021-08-06 15:05:52,587 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20944 ImplicationChecksByTransitivity, 9398.1ms TimeCoverageRelationStatistics Valid=5562, Invalid=48030, Unknown=0, NotChecked=0, Total=53592 [2021-08-06 15:05:52,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85593 states. [2021-08-06 15:05:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85593 to 17070. [2021-08-06 15:05:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17070 states, 17069 states have (on average 3.3529790848907375) internal successors, (57232), 17069 states have internal predecessors, (57232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:53,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17070 states to 17070 states and 57232 transitions. [2021-08-06 15:05:53,688 INFO L78 Accepts]: Start accepts. Automaton has 17070 states and 57232 transitions. Word has length 54 [2021-08-06 15:05:53,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:05:53,688 INFO L470 AbstractCegarLoop]: Abstraction has 17070 states and 57232 transitions. [2021-08-06 15:05:53,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:05:53,689 INFO L276 IsEmpty]: Start isEmpty. Operand 17070 states and 57232 transitions. [2021-08-06 15:05:53,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:05:53,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:05:53,729 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:05:53,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 15:05:53,944 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 [2021-08-06 15:05:53,945 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:05:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:05:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1773002663, now seen corresponding path program 46 times [2021-08-06 15:05:53,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:05:53,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057097505] [2021-08-06 15:05:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:05:53,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:05:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:05:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:05:54,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:05:54,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057097505] [2021-08-06 15:05:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057097505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:54,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469427383] [2021-08-06 15:05:54,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:05:54,838 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:05:54,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:05:54,839 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) [2021-08-06 15:05:54,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:05:57,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:05:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:05:57,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:05:57,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:05:58,903 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:05:58,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:05:59,188 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:05:59,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:05:59,333 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:05:59,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469427383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:05:59,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:05:59,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-08-06 15:05:59,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688474436] [2021-08-06 15:05:59,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 15:05:59,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:05:59,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 15:05:59,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:05:59,334 INFO L87 Difference]: Start difference. First operand 17070 states and 57232 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:11,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:11,812 INFO L93 Difference]: Finished difference Result 91627 states and 309094 transitions. [2021-08-06 15:06:11,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2021-08-06 15:06:11,812 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:06:11,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:12,084 INFO L225 Difference]: With dead ends: 91627 [2021-08-06 15:06:12,084 INFO L226 Difference]: Without dead ends: 90767 [2021-08-06 15:06:12,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22685 ImplicationChecksByTransitivity, 9549.2ms TimeCoverageRelationStatistics Valid=5422, Invalid=52900, Unknown=0, NotChecked=0, Total=58322 [2021-08-06 15:06:12,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90767 states. [2021-08-06 15:06:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90767 to 17890. [2021-08-06 15:06:13,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17890 states, 17889 states have (on average 3.3476438034546367) internal successors, (59886), 17889 states have internal predecessors, (59886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:13,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17890 states to 17890 states and 59886 transitions. [2021-08-06 15:06:13,273 INFO L78 Accepts]: Start accepts. Automaton has 17890 states and 59886 transitions. Word has length 54 [2021-08-06 15:06:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:13,273 INFO L470 AbstractCegarLoop]: Abstraction has 17890 states and 59886 transitions. [2021-08-06 15:06:13,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 17890 states and 59886 transitions. [2021-08-06 15:06:13,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:06:13,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:13,303 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:13,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:13,524 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 [2021-08-06 15:06:13,525 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:06:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1403099503, now seen corresponding path program 47 times [2021-08-06 15:06:13,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:13,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726213535] [2021-08-06 15:06:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:13,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-06 15:06:14,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:14,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726213535] [2021-08-06 15:06:14,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726213535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:14,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984247663] [2021-08-06 15:06:14,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:06:14,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:14,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:14,289 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) [2021-08-06 15:06:14,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:06:17,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:06:17,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:17,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-06 15:06:17,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:18,492 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:06:18,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:06:18,727 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:06:18,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:06:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:18,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984247663] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:18,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:18,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 45 [2021-08-06 15:06:18,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918497217] [2021-08-06 15:06:18,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-06 15:06:18,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-06 15:06:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-08-06 15:06:18,871 INFO L87 Difference]: Start difference. First operand 17890 states and 59886 transitions. Second operand has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:29,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:29,986 INFO L93 Difference]: Finished difference Result 78402 states and 264770 transitions. [2021-08-06 15:06:29,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2021-08-06 15:06:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:06:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:30,216 INFO L225 Difference]: With dead ends: 78402 [2021-08-06 15:06:30,216 INFO L226 Difference]: Without dead ends: 77552 [2021-08-06 15:06:30,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18865 ImplicationChecksByTransitivity, 8756.7ms TimeCoverageRelationStatistics Valid=5066, Invalid=43996, Unknown=0, NotChecked=0, Total=49062 [2021-08-06 15:06:30,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77552 states. [2021-08-06 15:06:30,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77552 to 18613. [2021-08-06 15:06:30,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18613 states, 18612 states have (on average 3.344455190199871) internal successors, (62247), 18612 states have internal predecessors, (62247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:30,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18613 states to 18613 states and 62247 transitions. [2021-08-06 15:06:30,991 INFO L78 Accepts]: Start accepts. Automaton has 18613 states and 62247 transitions. Word has length 54 [2021-08-06 15:06:30,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:30,991 INFO L470 AbstractCegarLoop]: Abstraction has 18613 states and 62247 transitions. [2021-08-06 15:06:30,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.9555555555555555) internal successors, (88), 45 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:30,991 INFO L276 IsEmpty]: Start isEmpty. Operand 18613 states and 62247 transitions. [2021-08-06 15:06:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:06:31,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:31,022 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:31,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:31,228 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 [2021-08-06 15:06:31,229 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:06:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -822932881, now seen corresponding path program 48 times [2021-08-06 15:06:31,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:31,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159564796] [2021-08-06 15:06:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:31,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:31,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:32,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:06:32,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:32,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159564796] [2021-08-06 15:06:32,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159564796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:32,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34360426] [2021-08-06 15:06:32,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:06:32,289 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:32,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:32,290 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) [2021-08-06 15:06:32,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:06:35,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:06:35,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:06:35,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2021-08-06 15:06:35,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:36,449 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:06:36,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:06:36,775 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 15:06:36,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 29 [2021-08-06 15:06:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:36,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34360426] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:36,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:36,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-08-06 15:06:36,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459279961] [2021-08-06 15:06:36,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:06:36,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:36,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:06:36,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1883, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:06:36,932 INFO L87 Difference]: Start difference. First operand 18613 states and 62247 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:06:50,093 INFO L93 Difference]: Finished difference Result 92896 states and 312808 transitions. [2021-08-06 15:06:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2021-08-06 15:06:50,094 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:06:50,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:06:50,371 INFO L225 Difference]: With dead ends: 92896 [2021-08-06 15:06:50,371 INFO L226 Difference]: Without dead ends: 92076 [2021-08-06 15:06:50,373 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21224 ImplicationChecksByTransitivity, 9160.9ms TimeCoverageRelationStatistics Valid=4937, Invalid=51469, Unknown=0, NotChecked=0, Total=56406 [2021-08-06 15:06:50,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92076 states. [2021-08-06 15:06:51,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92076 to 19141. [2021-08-06 15:06:51,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19141 states, 19140 states have (on average 3.3373563218390805) internal successors, (63877), 19140 states have internal predecessors, (63877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19141 states to 19141 states and 63877 transitions. [2021-08-06 15:06:51,559 INFO L78 Accepts]: Start accepts. Automaton has 19141 states and 63877 transitions. Word has length 54 [2021-08-06 15:06:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:06:51,559 INFO L470 AbstractCegarLoop]: Abstraction has 19141 states and 63877 transitions. [2021-08-06 15:06:51,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:06:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19141 states and 63877 transitions. [2021-08-06 15:06:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:06:51,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:06:51,602 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:06:51,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-06 15:06:51,802 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 [2021-08-06 15:06:51,802 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:06:51,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:06:51,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1330256687, now seen corresponding path program 49 times [2021-08-06 15:06:51,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:06:51,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717113152] [2021-08-06 15:06:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:06:51,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:06:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:06:52,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:06:52,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717113152] [2021-08-06 15:06:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717113152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:52,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169488583] [2021-08-06 15:06:52,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:06:52,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:06:52,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:06:52,574 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) [2021-08-06 15:06:52,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:06:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:06:55,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:06:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:06:56,856 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:06:56,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:06:57,158 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:06:57,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:06:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:06:57,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169488583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:06:57,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:06:57,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-08-06 15:06:57,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53948109] [2021-08-06 15:06:57,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:06:57,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:06:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:06:57,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1879, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:06:57,307 INFO L87 Difference]: Start difference. First operand 19141 states and 63877 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:12,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:12,848 INFO L93 Difference]: Finished difference Result 117321 states and 394750 transitions. [2021-08-06 15:07:12,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2021-08-06 15:07:12,849 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:07:12,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:13,224 INFO L225 Difference]: With dead ends: 117321 [2021-08-06 15:07:13,224 INFO L226 Difference]: Without dead ends: 116491 [2021-08-06 15:07:13,227 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29781 ImplicationChecksByTransitivity, 11787.1ms TimeCoverageRelationStatistics Valid=6740, Invalid=69160, Unknown=0, NotChecked=0, Total=75900 [2021-08-06 15:07:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116491 states. [2021-08-06 15:07:14,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116491 to 20389. [2021-08-06 15:07:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20389 states, 20388 states have (on average 3.3312242495585638) internal successors, (67917), 20388 states have internal predecessors, (67917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:14,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20389 states to 20389 states and 67917 transitions. [2021-08-06 15:07:14,610 INFO L78 Accepts]: Start accepts. Automaton has 20389 states and 67917 transitions. Word has length 54 [2021-08-06 15:07:14,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:14,610 INFO L470 AbstractCegarLoop]: Abstraction has 20389 states and 67917 transitions. [2021-08-06 15:07:14,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:14,610 INFO L276 IsEmpty]: Start isEmpty. Operand 20389 states and 67917 transitions. [2021-08-06 15:07:14,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:07:14,642 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:14,642 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:14,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:14,842 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 [2021-08-06 15:07:14,842 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:07:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash 2046631599, now seen corresponding path program 50 times [2021-08-06 15:07:14,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:14,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362966466] [2021-08-06 15:07:15,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:15,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:07:15,766 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:15,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362966466] [2021-08-06 15:07:15,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362966466] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:15,766 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401998729] [2021-08-06 15:07:15,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:07:15,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:15,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:15,767 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) [2021-08-06 15:07:15,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:07:18,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:07:18,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:18,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:07:18,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:20,095 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:07:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:07:20,395 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:07:20,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:07:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:20,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401998729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:20,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:20,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-08-06 15:07:20,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953755876] [2021-08-06 15:07:20,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:07:20,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:07:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:07:20,543 INFO L87 Difference]: Start difference. First operand 20389 states and 67917 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:36,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:36,959 INFO L93 Difference]: Finished difference Result 125522 states and 421674 transitions. [2021-08-06 15:07:36,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-08-06 15:07:36,960 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:07:36,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:37,360 INFO L225 Difference]: With dead ends: 125522 [2021-08-06 15:07:37,360 INFO L226 Difference]: Without dead ends: 123862 [2021-08-06 15:07:37,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28590 ImplicationChecksByTransitivity, 12131.7ms TimeCoverageRelationStatistics Valid=6899, Invalid=66271, Unknown=0, NotChecked=0, Total=73170 [2021-08-06 15:07:37,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123862 states. [2021-08-06 15:07:38,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123862 to 22242. [2021-08-06 15:07:38,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22242 states, 22241 states have (on average 3.3230969830493233) internal successors, (73909), 22241 states have internal predecessors, (73909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22242 states to 22242 states and 73909 transitions. [2021-08-06 15:07:39,043 INFO L78 Accepts]: Start accepts. Automaton has 22242 states and 73909 transitions. Word has length 54 [2021-08-06 15:07:39,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:39,043 INFO L470 AbstractCegarLoop]: Abstraction has 22242 states and 73909 transitions. [2021-08-06 15:07:39,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:39,043 INFO L276 IsEmpty]: Start isEmpty. Operand 22242 states and 73909 transitions. [2021-08-06 15:07:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:07:39,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:39,075 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:39,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:39,275 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 [2021-08-06 15:07:39,276 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:07:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2101524083, now seen corresponding path program 51 times [2021-08-06 15:07:39,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:39,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772524096] [2021-08-06 15:07:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:39,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:39,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-06 15:07:40,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:40,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772524096] [2021-08-06 15:07:40,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772524096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:40,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7082640] [2021-08-06 15:07:40,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:07:40,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:40,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:40,067 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) [2021-08-06 15:07:40,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:07:43,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:07:43,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:07:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 47 conjunts are in the unsatisfiable core [2021-08-06 15:07:43,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:07:44,706 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:07:44,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:07:44,906 INFO L354 Elim1Store]: treesize reduction 64, result has 4.5 percent of original size [2021-08-06 15:07:44,906 INFO L388 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 48 treesize of output 29 [2021-08-06 15:07:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:07:45,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7082640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:45,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:07:45,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2021-08-06 15:07:45,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688062334] [2021-08-06 15:07:45,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-06 15:07:45,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:07:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-06 15:07:45,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1880, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 15:07:45,059 INFO L87 Difference]: Start difference. First operand 22242 states and 73909 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:55,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:07:55,322 INFO L93 Difference]: Finished difference Result 70923 states and 238912 transitions. [2021-08-06 15:07:55,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-08-06 15:07:55,323 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:07:55,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:07:55,517 INFO L225 Difference]: With dead ends: 70923 [2021-08-06 15:07:55,517 INFO L226 Difference]: Without dead ends: 69863 [2021-08-06 15:07:55,518 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11675 ImplicationChecksByTransitivity, 7154.6ms TimeCoverageRelationStatistics Valid=3411, Invalid=30261, Unknown=0, NotChecked=0, Total=33672 [2021-08-06 15:07:55,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69863 states. [2021-08-06 15:07:56,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69863 to 22340. [2021-08-06 15:07:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22340 states, 22339 states have (on average 3.3219929271677335) internal successors, (74210), 22339 states have internal predecessors, (74210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:56,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22340 states to 22340 states and 74210 transitions. [2021-08-06 15:07:56,368 INFO L78 Accepts]: Start accepts. Automaton has 22340 states and 74210 transitions. Word has length 54 [2021-08-06 15:07:56,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:07:56,368 INFO L470 AbstractCegarLoop]: Abstraction has 22340 states and 74210 transitions. [2021-08-06 15:07:56,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:07:56,368 INFO L276 IsEmpty]: Start isEmpty. Operand 22340 states and 74210 transitions. [2021-08-06 15:07:56,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:07:56,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:07:56,402 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:07:56,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:07:56,602 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 [2021-08-06 15:07:56,602 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:07:56,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:07:56,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1126412741, now seen corresponding path program 52 times [2021-08-06 15:07:56,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:07:56,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046081870] [2021-08-06 15:07:56,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:07:56,603 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:07:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:07:57,428 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-06 15:07:57,428 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:07:57,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046081870] [2021-08-06 15:07:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046081870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:07:57,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817347400] [2021-08-06 15:07:57,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:07:57,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:07:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:07:57,429 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) [2021-08-06 15:07:57,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:08:00,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:08:00,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:00,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:08:00,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:02,194 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:08:02,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:08:02,430 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:08:02,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:08:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:02,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817347400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:02,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:02,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 43 [2021-08-06 15:08:02,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852349675] [2021-08-06 15:08:02,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-06 15:08:02,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:02,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-06 15:08:02,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 15:08:02,573 INFO L87 Difference]: Start difference. First operand 22340 states and 74210 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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) [2021-08-06 15:08:15,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:15,837 INFO L93 Difference]: Finished difference Result 151189 states and 517977 transitions. [2021-08-06 15:08:15,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2021-08-06 15:08:15,838 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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 54 [2021-08-06 15:08:15,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:16,737 INFO L225 Difference]: With dead ends: 151189 [2021-08-06 15:08:16,737 INFO L226 Difference]: Without dead ends: 146424 [2021-08-06 15:08:16,740 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28507 ImplicationChecksByTransitivity, 10929.7ms TimeCoverageRelationStatistics Valid=7069, Invalid=62891, Unknown=0, NotChecked=0, Total=69960 [2021-08-06 15:08:16,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146424 states. [2021-08-06 15:08:18,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146424 to 25508. [2021-08-06 15:08:18,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25508 states, 25507 states have (on average 3.3044262359352334) internal successors, (84286), 25507 states have internal predecessors, (84286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25508 states to 25508 states and 84286 transitions. [2021-08-06 15:08:18,837 INFO L78 Accepts]: Start accepts. Automaton has 25508 states and 84286 transitions. Word has length 54 [2021-08-06 15:08:18,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:18,837 INFO L470 AbstractCegarLoop]: Abstraction has 25508 states and 84286 transitions. [2021-08-06 15:08:18,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 43 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) [2021-08-06 15:08:18,837 INFO L276 IsEmpty]: Start isEmpty. Operand 25508 states and 84286 transitions. [2021-08-06 15:08:18,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:08:18,878 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:18,879 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:18,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:08:19,079 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 [2021-08-06 15:08:19,079 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:08:19,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:19,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1875719185, now seen corresponding path program 53 times [2021-08-06 15:08:19,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:19,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372494960] [2021-08-06 15:08:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:19,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:08:19,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:19,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372494960] [2021-08-06 15:08:19,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372494960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:19,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405046606] [2021-08-06 15:08:19,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:08:19,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:19,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:19,765 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) [2021-08-06 15:08:19,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:08:23,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:08:23,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:23,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:08:23,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:24,708 INFO L354 Elim1Store]: treesize reduction 98, result has 6.7 percent of original size [2021-08-06 15:08:24,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 59 treesize of output 45 [2021-08-06 15:08:25,105 INFO L354 Elim1Store]: treesize reduction 151, result has 6.2 percent of original size [2021-08-06 15:08:25,105 INFO L388 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 46 treesize of output 35 [2021-08-06 15:08:25,249 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:25,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405046606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:25,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:25,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-08-06 15:08:25,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146373299] [2021-08-06 15:08:25,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:08:25,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:25,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:08:25,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:08:25,250 INFO L87 Difference]: Start difference. First operand 25508 states and 84286 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:38,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:08:38,411 INFO L93 Difference]: Finished difference Result 105903 states and 355765 transitions. [2021-08-06 15:08:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2021-08-06 15:08:38,411 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:08:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:08:38,756 INFO L225 Difference]: With dead ends: 105903 [2021-08-06 15:08:38,757 INFO L226 Difference]: Without dead ends: 105053 [2021-08-06 15:08:38,759 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23523 ImplicationChecksByTransitivity, 10161.1ms TimeCoverageRelationStatistics Valid=5760, Invalid=53532, Unknown=0, NotChecked=0, Total=59292 [2021-08-06 15:08:38,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105053 states. [2021-08-06 15:08:40,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105053 to 27130. [2021-08-06 15:08:40,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27130 states, 27129 states have (on average 3.299789892734712) internal successors, (89520), 27129 states have internal predecessors, (89520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27130 states to 27130 states and 89520 transitions. [2021-08-06 15:08:40,296 INFO L78 Accepts]: Start accepts. Automaton has 27130 states and 89520 transitions. Word has length 54 [2021-08-06 15:08:40,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:08:40,296 INFO L470 AbstractCegarLoop]: Abstraction has 27130 states and 89520 transitions. [2021-08-06 15:08:40,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:08:40,296 INFO L276 IsEmpty]: Start isEmpty. Operand 27130 states and 89520 transitions. [2021-08-06 15:08:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:08:40,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:08:40,346 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:08:40,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:08:40,548 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 [2021-08-06 15:08:40,549 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:08:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:08:40,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1911924305, now seen corresponding path program 54 times [2021-08-06 15:08:40,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:08:40,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369251408] [2021-08-06 15:08:40,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:08:40,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:08:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:08:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:08:41,124 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:08:41,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369251408] [2021-08-06 15:08:41,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369251408] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:41,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626261177] [2021-08-06 15:08:41,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:08:41,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:08:41,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:08:41,125 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) [2021-08-06 15:08:41,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:08:44,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:08:44,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:08:44,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:08:44,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:08:46,055 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:08:46,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:08:46,349 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:08:46,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:08:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:08:46,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626261177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:08:46,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:08:46,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-08-06 15:08:46,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934911288] [2021-08-06 15:08:46,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:08:46,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:08:46,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:08:46,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:08:46,492 INFO L87 Difference]: Start difference. First operand 27130 states and 89520 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:01,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:01,366 INFO L93 Difference]: Finished difference Result 130848 states and 440044 transitions. [2021-08-06 15:09:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 238 states. [2021-08-06 15:09:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:09:01,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:02,095 INFO L225 Difference]: With dead ends: 130848 [2021-08-06 15:09:02,095 INFO L226 Difference]: Without dead ends: 129838 [2021-08-06 15:09:02,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31329 ImplicationChecksByTransitivity, 11734.5ms TimeCoverageRelationStatistics Valid=7681, Invalid=69325, Unknown=0, NotChecked=0, Total=77006 [2021-08-06 15:09:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129838 states. [2021-08-06 15:09:03,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129838 to 27666. [2021-08-06 15:09:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27666 states, 27665 states have (on average 3.3028736670883787) internal successors, (91374), 27665 states have internal predecessors, (91374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:03,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27666 states to 27666 states and 91374 transitions. [2021-08-06 15:09:03,688 INFO L78 Accepts]: Start accepts. Automaton has 27666 states and 91374 transitions. Word has length 54 [2021-08-06 15:09:03,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:03,688 INFO L470 AbstractCegarLoop]: Abstraction has 27666 states and 91374 transitions. [2021-08-06 15:09:03,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:03,688 INFO L276 IsEmpty]: Start isEmpty. Operand 27666 states and 91374 transitions. [2021-08-06 15:09:03,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:09:03,881 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:03,882 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:03,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 15:09:04,103 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 [2021-08-06 15:09:04,104 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:09:04,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:04,104 INFO L82 PathProgramCache]: Analyzing trace with hash 993845295, now seen corresponding path program 55 times [2021-08-06 15:09:04,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:04,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9653929] [2021-08-06 15:09:04,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:04,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:04,790 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:09:04,790 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:04,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9653929] [2021-08-06 15:09:04,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9653929] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:04,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248780935] [2021-08-06 15:09:04,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:09:04,791 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:04,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:04,792 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) [2021-08-06 15:09:04,792 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:09:08,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:09:08,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:09,712 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:09:09,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:09:10,001 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:09:10,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:09:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:10,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248780935] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:10,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:10,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-08-06 15:09:10,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720011886] [2021-08-06 15:09:10,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:09:10,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:10,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:09:10,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=1702, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:09:10,142 INFO L87 Difference]: Start difference. First operand 27666 states and 91374 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:28,091 INFO L93 Difference]: Finished difference Result 144998 states and 487715 transitions. [2021-08-06 15:09:28,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2021-08-06 15:09:28,091 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:09:28,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:28,858 INFO L225 Difference]: With dead ends: 144998 [2021-08-06 15:09:28,858 INFO L226 Difference]: Without dead ends: 143428 [2021-08-06 15:09:28,861 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42255 ImplicationChecksByTransitivity, 14455.0ms TimeCoverageRelationStatistics Valid=9725, Invalid=90447, Unknown=0, NotChecked=0, Total=100172 [2021-08-06 15:09:29,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143428 states. [2021-08-06 15:09:30,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143428 to 27988. [2021-08-06 15:09:30,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27988 states, 27987 states have (on average 3.3013899310394113) internal successors, (92396), 27987 states have internal predecessors, (92396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27988 states to 27988 states and 92396 transitions. [2021-08-06 15:09:30,609 INFO L78 Accepts]: Start accepts. Automaton has 27988 states and 92396 transitions. Word has length 54 [2021-08-06 15:09:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:30,609 INFO L470 AbstractCegarLoop]: Abstraction has 27988 states and 92396 transitions. [2021-08-06 15:09:30,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 27988 states and 92396 transitions. [2021-08-06 15:09:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:09:30,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:30,658 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:30,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:09:30,858 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 [2021-08-06 15:09:30,859 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:09:30,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:30,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1300382981, now seen corresponding path program 56 times [2021-08-06 15:09:30,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:30,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293285021] [2021-08-06 15:09:30,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:30,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:09:31,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:31,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293285021] [2021-08-06 15:09:31,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293285021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:31,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135964702] [2021-08-06 15:09:31,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:09:31,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:31,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:31,785 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) [2021-08-06 15:09:31,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:09:35,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:09:35,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:35,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:09:35,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:09:36,938 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:09:36,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:09:37,166 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:09:37,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-08-06 15:09:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:09:37,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135964702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:37,316 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:09:37,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-08-06 15:09:37,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503725568] [2021-08-06 15:09:37,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:09:37,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:09:37,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:09:37,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:09:37,317 INFO L87 Difference]: Start difference. First operand 27988 states and 92396 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:51,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:09:51,847 INFO L93 Difference]: Finished difference Result 126496 states and 424574 transitions. [2021-08-06 15:09:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-08-06 15:09:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:09:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:09:52,296 INFO L225 Difference]: With dead ends: 126496 [2021-08-06 15:09:52,296 INFO L226 Difference]: Without dead ends: 125481 [2021-08-06 15:09:52,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29154 ImplicationChecksByTransitivity, 11193.0ms TimeCoverageRelationStatistics Valid=7000, Invalid=65092, Unknown=0, NotChecked=0, Total=72092 [2021-08-06 15:09:52,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125481 states. [2021-08-06 15:09:54,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125481 to 27454. [2021-08-06 15:09:54,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27454 states, 27453 states have (on average 3.298473755145157) internal successors, (90553), 27453 states have internal predecessors, (90553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:54,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27454 states to 27454 states and 90553 transitions. [2021-08-06 15:09:54,308 INFO L78 Accepts]: Start accepts. Automaton has 27454 states and 90553 transitions. Word has length 54 [2021-08-06 15:09:54,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:09:54,309 INFO L470 AbstractCegarLoop]: Abstraction has 27454 states and 90553 transitions. [2021-08-06 15:09:54,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:09:54,309 INFO L276 IsEmpty]: Start isEmpty. Operand 27454 states and 90553 transitions. [2021-08-06 15:09:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:09:54,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:09:54,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:09:54,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 15:09:54,556 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 [2021-08-06 15:09:54,557 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:09:54,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:09:54,557 INFO L82 PathProgramCache]: Analyzing trace with hash 382303971, now seen corresponding path program 57 times [2021-08-06 15:09:54,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:09:54,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556395942] [2021-08-06 15:09:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:09:54,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:09:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:09:55,326 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:09:55,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:09:55,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556395942] [2021-08-06 15:09:55,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556395942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:09:55,326 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105474730] [2021-08-06 15:09:55,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:09:55,327 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:09:55,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:09:55,327 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) [2021-08-06 15:09:55,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:09:59,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:09:59,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:09:59,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-06 15:09:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:00,434 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-08-06 15:10:00,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 31 [2021-08-06 15:10:00,683 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-06 15:10:00,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-08-06 15:10:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:10:00,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105474730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:00,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:10:00,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 44 [2021-08-06 15:10:00,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775170147] [2021-08-06 15:10:00,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-06 15:10:00,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:10:00,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-06 15:10:00,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:10:00,824 INFO L87 Difference]: Start difference. First operand 27454 states and 90553 transitions. Second operand has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:10:18,701 INFO L93 Difference]: Finished difference Result 148807 states and 502314 transitions. [2021-08-06 15:10:18,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 266 states. [2021-08-06 15:10:18,702 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-06 15:10:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:10:19,247 INFO L225 Difference]: With dead ends: 148807 [2021-08-06 15:10:19,247 INFO L226 Difference]: Without dead ends: 145405 [2021-08-06 15:10:19,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39133 ImplicationChecksByTransitivity, 13715.6ms TimeCoverageRelationStatistics Valid=9142, Invalid=84188, Unknown=0, NotChecked=0, Total=93330 [2021-08-06 15:10:19,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145405 states. [2021-08-06 15:10:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145405 to 27188. [2021-08-06 15:10:21,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27188 states, 27187 states have (on average 3.3009158789127158) internal successors, (89742), 27187 states have internal predecessors, (89742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27188 states to 27188 states and 89742 transitions. [2021-08-06 15:10:21,343 INFO L78 Accepts]: Start accepts. Automaton has 27188 states and 89742 transitions. Word has length 54 [2021-08-06 15:10:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:10:21,343 INFO L470 AbstractCegarLoop]: Abstraction has 27188 states and 89742 transitions. [2021-08-06 15:10:21,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:10:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27188 states and 89742 transitions. [2021-08-06 15:10:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-06 15:10:21,392 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:10:21,392 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:10:21,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:21,592 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 [2021-08-06 15:10:21,593 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2021-08-06 15:10:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:10:21,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1048737779, now seen corresponding path program 58 times [2021-08-06 15:10:21,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:10:21,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121548152] [2021-08-06 15:10:21,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:10:21,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:10:21,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:10:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 15:10:22,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:10:22,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121548152] [2021-08-06 15:10:22,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121548152] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:10:22,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093671060] [2021-08-06 15:10:22,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:10:22,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:10:22,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:10:22,513 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) [2021-08-06 15:10:22,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 15:10:26,054 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 [2021-08-06 15:10:26,069 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 15:10:26,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:10:26,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:10:26,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-06 15:10:26,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:10:26,385 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-06 15:10:26,386 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 15:10:26,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:10:26,586 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 [2021-08-06 15:10:26,587 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-06 15:10:26,588 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 15:10:26,588 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 15:10:26,588 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 15:10:26,589 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3INUSE_VIOLATION [2021-08-06 15:10:26,592 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 15:10:26,592 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 15:10:26,593 INFO L202 PluginConnector]: Adding new model prod-cons3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 03:10:26 BasicIcfg [2021-08-06 15:10:26,593 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 15:10:26,594 INFO L168 Benchmark]: Toolchain (without parser) took 707841.23 ms. Allocated memory was 178.3 MB in the beginning and 4.3 GB in the end (delta: 4.2 GB). Free memory was 158.7 MB in the beginning and 1.5 GB in the end (delta: -1.3 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.41 ms. Allocated memory is still 178.3 MB. Free memory was 158.5 MB in the beginning and 157.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 INFO L168 Benchmark]: Boogie Preprocessor took 26.56 ms. Allocated memory is still 178.3 MB. Free memory was 157.0 MB in the beginning and 156.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 INFO L168 Benchmark]: RCFGBuilder took 339.46 ms. Allocated memory is still 178.3 MB. Free memory was 156.0 MB in the beginning and 140.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 INFO L168 Benchmark]: TraceAbstraction took 707440.80 ms. Allocated memory was 178.3 MB in the beginning and 4.3 GB in the end (delta: 4.2 GB). Free memory was 140.1 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. [2021-08-06 15:10:26,594 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 0.12 ms. Allocated memory is still 178.3 MB. Free memory is still 159.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.41 ms. Allocated memory is still 178.3 MB. Free memory was 158.5 MB in the beginning and 157.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 26.56 ms. Allocated memory is still 178.3 MB. Free memory was 157.0 MB in the beginning and 156.0 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 339.46 ms. Allocated memory is still 178.3 MB. Free memory was 156.0 MB in the beginning and 140.5 MB in the end (delta: 15.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 707440.80 ms. Allocated memory was 178.3 MB in the beginning and 4.3 GB in the end (delta: 4.2 GB). Free memory was 140.1 MB in the beginning and 1.5 GB in the end (delta: -1.4 GB). Peak memory consumption was 2.8 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 80]: 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 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 80]: 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 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 81]: 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 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 82]: 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 55 with TraceHistMax 3,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 9 procedures, 61 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 707296.0ms, OverallIterations: 62, TraceHistogramMax: 3, EmptinessCheckTime: 1569.1ms, AutomataDifference: 449770.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 92.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 5879 SDtfs, 68788 SDslu, 105314 SDs, 0 SdLazy, 214326 SolverSat, 20178 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97131.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11280 GetRequests, 1874 SyntacticMatches, 94 SemanticMatches, 9312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746541 ImplicationChecksByTransitivity, 335289.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=27988occurred in iteration=59, InterpolantAutomatonStates: 7583, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 40317.1ms AutomataMinimizationTime, 61 MinimizatonAttempts, 2594880 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 386.4ms SsaConstructionTime, 1703.8ms SatisfiabilityAnalysisTime, 99412.4ms InterpolantComputationTime, 5534 NumberOfCodeBlocks, 5534 NumberOfCodeBlocksAsserted, 222 NumberOfCheckSat, 5416 ConstructedInterpolants, 31 QuantifiedInterpolants, 77803 SizeOfPredicates, 588 NumberOfNonLiveVariables, 7416 ConjunctsInSsa, 1869 ConjunctsInUnsatCore, 118 InterpolantComputations, 6 PerfectInterpolantSequences, 753/2815 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