/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/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 14:25:14,936 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 14:25:14,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 14:25:14,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 14:25:15,030 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 14:25:15,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 14:25:15,058 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 14:25:15,059 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 14:25:15,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 14:25:15,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 14:25:15,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 14:25:15,061 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 14:25:15,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 14:25:15,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 14:25:15,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 14:25:15,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 14:25:15,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 14:25:15,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 14:25:15,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:25:15,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 14:25:15,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 14:25:15,064 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 14:25:15,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 14:25:15,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 14:25:15,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 14:25:15,342 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 14:25:15,343 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 14:25:15,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2021-08-06 14:25:15,344 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2021-08-06 14:25:15,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 14:25:15,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 14:25:15,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 14:25:15,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 14:25:15,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 14:25:15,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,418 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 14:25:15,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 14:25:15,420 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 14:25:15,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 14:25:15,427 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,428 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,428 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,430 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,433 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 14:25:15,434 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 14:25:15,434 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 14:25:15,434 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 14:25:15,436 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/1) ... [2021-08-06 14:25:15,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 14:25:15,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:15,475 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 14:25:15,484 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 14:25:15,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 14:25:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 14:25:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 14:25:15,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 14:25:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 14:25:15,513 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 14:25:15,517 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 14:25:15,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 14:25:15,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 14:25:15,521 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 14:25:15,521 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 14:25:15,521 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 14:25:15,521 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 14:25:15,857 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 14:25:15,857 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-06 14:25:15,858 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:25:15 BoogieIcfgContainer [2021-08-06 14:25:15,859 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 14:25:15,860 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 14:25:15,860 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 14:25:15,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 14:25:15,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 02:25:15" (1/2) ... [2021-08-06 14:25:15,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5983a600 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 02:25:15, skipping insertion in model container [2021-08-06 14:25:15,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 02:25:15" (2/2) ... [2021-08-06 14:25:15,864 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2021-08-06 14:25:15,870 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 14:25:15,870 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 14:25:15,870 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 14:25:15,870 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 14:25:15,919 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 14:25:15,961 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 14:25:15,968 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 14:25:15,969 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 14:25:15,977 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2021-08-06 14:25:16,002 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 14:25:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 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 14:25:16,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:16,011 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,012 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,012 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,016 INFO L82 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2021-08-06 14:25:16,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204940707] [2021-08-06 14:25:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,165 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 14:25:16,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204940707] [2021-08-06 14:25:16,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204940707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:25:16,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425404646] [2021-08-06 14:25:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:25:16,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:25:16,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:25:16,184 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 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 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:16,230 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2021-08-06 14:25:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:25:16,231 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:25:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:16,241 INFO L225 Difference]: With dead ends: 248 [2021-08-06 14:25:16,242 INFO L226 Difference]: Without dead ends: 248 [2021-08-06 14:25:16,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:25:16,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-08-06 14:25:16,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2021-08-06 14:25:16,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 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 14:25:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2021-08-06 14:25:16,295 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2021-08-06 14:25:16,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,296 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2021-08-06 14:25:16,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,296 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2021-08-06 14:25:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:16,297 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,297 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 14:25:16,297 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,298 INFO L82 PathProgramCache]: Analyzing trace with hash -515592662, now seen corresponding path program 2 times [2021-08-06 14:25:16,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715429467] [2021-08-06 14:25:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,331 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 14:25:16,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715429467] [2021-08-06 14:25:16,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715429467] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:25:16,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072803941] [2021-08-06 14:25:16,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:25:16,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:25:16,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:25:16,334 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:16,345 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2021-08-06 14:25:16,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:25:16,346 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:25:16,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:16,347 INFO L225 Difference]: With dead ends: 206 [2021-08-06 14:25:16,347 INFO L226 Difference]: Without dead ends: 183 [2021-08-06 14:25:16,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:25:16,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-08-06 14:25:16,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2021-08-06 14:25:16,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 14:25:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-08-06 14:25:16,355 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-08-06 14:25:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,355 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-08-06 14:25:16,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-08-06 14:25:16,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-06 14:25:16,356 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,357 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 14:25:16,357 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1307213656, now seen corresponding path program 3 times [2021-08-06 14:25:16,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110337999] [2021-08-06 14:25:16,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,358 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,407 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 14:25:16,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110337999] [2021-08-06 14:25:16,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110337999] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 14:25:16,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105857503] [2021-08-06 14:25:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 14:25:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 14:25:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 14:25:16,409 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:16,424 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2021-08-06 14:25:16,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:25:16,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-06 14:25:16,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:16,425 INFO L225 Difference]: With dead ends: 141 [2021-08-06 14:25:16,425 INFO L226 Difference]: Without dead ends: 141 [2021-08-06 14:25:16,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:16,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-06 14:25:16,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2021-08-06 14:25:16,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 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 14:25:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2021-08-06 14:25:16,431 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2021-08-06 14:25:16,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,431 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2021-08-06 14:25:16,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:16,432 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2021-08-06 14:25:16,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:25:16,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,433 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 14:25:16,433 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1870215385, now seen corresponding path program 1 times [2021-08-06 14:25:16,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361332787] [2021-08-06 14:25:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:16,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361332787] [2021-08-06 14:25:16,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361332787] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,539 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:25:16,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623928591] [2021-08-06 14:25:16,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:25:16,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:25:16,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:16,540 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:16,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:16,573 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2021-08-06 14:25:16,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 14:25:16,573 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:25:16,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:16,575 INFO L225 Difference]: With dead ends: 265 [2021-08-06 14:25:16,575 INFO L226 Difference]: Without dead ends: 238 [2021-08-06 14:25:16,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-08-06 14:25:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2021-08-06 14:25:16,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 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 14:25:16,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2021-08-06 14:25:16,582 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2021-08-06 14:25:16,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,583 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2021-08-06 14:25:16,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:16,583 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2021-08-06 14:25:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:25:16,584 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,584 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 14:25:16,584 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,585 INFO L82 PathProgramCache]: Analyzing trace with hash 483254867, now seen corresponding path program 2 times [2021-08-06 14:25:16,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282707810] [2021-08-06 14:25:16,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:16,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,754 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282707810] [2021-08-06 14:25:16,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282707810] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:25:16,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337137433] [2021-08-06 14:25:16,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:25:16,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:25:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:16,757 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:16,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:16,855 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2021-08-06 14:25:16,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:16,856 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:25:16,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:16,858 INFO L225 Difference]: With dead ends: 372 [2021-08-06 14:25:16,858 INFO L226 Difference]: Without dead ends: 345 [2021-08-06 14:25:16,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:25:16,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-08-06 14:25:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2021-08-06 14:25:16,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 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 14:25:16,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2021-08-06 14:25:16,874 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2021-08-06 14:25:16,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:16,874 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2021-08-06 14:25:16,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2021-08-06 14:25:16,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:25:16,875 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:16,875 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:16,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 14:25:16,875 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:16,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:16,876 INFO L82 PathProgramCache]: Analyzing trace with hash 498715663, now seen corresponding path program 3 times [2021-08-06 14:25:16,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:16,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306994466] [2021-08-06 14:25:16,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:16,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:16,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:16,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:16,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306994466] [2021-08-06 14:25:16,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306994466] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:16,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:16,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:25:16,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041213639] [2021-08-06 14:25:16,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:25:16,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:16,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:25:16,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:16,982 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:17,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,137 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2021-08-06 14:25:17,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,137 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:25:17,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,139 INFO L225 Difference]: With dead ends: 372 [2021-08-06 14:25:17,139 INFO L226 Difference]: Without dead ends: 332 [2021-08-06 14:25:17,139 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:25:17,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-08-06 14:25:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2021-08-06 14:25:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 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 14:25:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2021-08-06 14:25:17,144 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2021-08-06 14:25:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,145 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2021-08-06 14:25:17,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:17,145 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2021-08-06 14:25:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 14:25:17,145 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,146 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 14:25:17,146 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1735391831, now seen corresponding path program 4 times [2021-08-06 14:25:17,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895702765] [2021-08-06 14:25:17,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:17,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895702765] [2021-08-06 14:25:17,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895702765] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-06 14:25:17,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712743532] [2021-08-06 14:25:17,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 14:25:17,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 14:25:17,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:17,248 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:17,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,312 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2021-08-06 14:25:17,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,312 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 14:25:17,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,314 INFO L225 Difference]: With dead ends: 318 [2021-08-06 14:25:17,314 INFO L226 Difference]: Without dead ends: 255 [2021-08-06 14:25:17,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-06 14:25:17,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-08-06 14:25:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2021-08-06 14:25:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 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 14:25:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2021-08-06 14:25:17,319 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2021-08-06 14:25:17,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,319 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2021-08-06 14:25:17,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 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 14:25:17,319 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2021-08-06 14:25:17,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,320 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-06 14:25:17,320 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1322929447, now seen corresponding path program 1 times [2021-08-06 14:25:17,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340851860] [2021-08-06 14:25:17,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,321 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,354 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 14:25:17,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340851860] [2021-08-06 14:25:17,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340851860] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714216257] [2021-08-06 14:25:17,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,355 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,375 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2021-08-06 14:25:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,375 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,376 INFO L225 Difference]: With dead ends: 285 [2021-08-06 14:25:17,376 INFO L226 Difference]: Without dead ends: 261 [2021-08-06 14:25:17,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:17,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-06 14:25:17,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2021-08-06 14:25:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 14:25:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:25:17,381 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-08-06 14:25:17,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,381 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:25:17,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,381 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:25:17,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,382 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 14:25:17,382 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,382 INFO L82 PathProgramCache]: Analyzing trace with hash 239156717, now seen corresponding path program 1 times [2021-08-06 14:25:17,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565422097] [2021-08-06 14:25:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,417 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 14:25:17,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565422097] [2021-08-06 14:25:17,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565422097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008238778] [2021-08-06 14:25:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,419 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,444 INFO L93 Difference]: Finished difference Result 279 states and 816 transitions. [2021-08-06 14:25:17,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,445 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,447 INFO L225 Difference]: With dead ends: 279 [2021-08-06 14:25:17,447 INFO L226 Difference]: Without dead ends: 279 [2021-08-06 14:25:17,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:17,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-06 14:25:17,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2021-08-06 14:25:17,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 14:25:17,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2021-08-06 14:25:17,453 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2021-08-06 14:25:17,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,453 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2021-08-06 14:25:17,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2021-08-06 14:25:17,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-06 14:25:17,456 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,456 INFO L82 PathProgramCache]: Analyzing trace with hash 844392021, now seen corresponding path program 2 times [2021-08-06 14:25:17,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315935827] [2021-08-06 14:25:17,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,456 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,496 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 14:25:17,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315935827] [2021-08-06 14:25:17,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315935827] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656121976] [2021-08-06 14:25:17,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,498 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,558 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2021-08-06 14:25:17,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,559 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,560 INFO L225 Difference]: With dead ends: 333 [2021-08-06 14:25:17,560 INFO L226 Difference]: Without dead ends: 321 [2021-08-06 14:25:17,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:17,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-06 14:25:17,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2021-08-06 14:25:17,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 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 14:25:17,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-08-06 14:25:17,566 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-08-06 14:25:17,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,566 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-08-06 14:25:17,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-08-06 14:25:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,567 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 14:25:17,567 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -11164707, now seen corresponding path program 2 times [2021-08-06 14:25:17,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521125034] [2021-08-06 14:25:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,607 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 14:25:17,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521125034] [2021-08-06 14:25:17,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521125034] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200234909] [2021-08-06 14:25:17,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,609 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,649 INFO L93 Difference]: Finished difference Result 297 states and 852 transitions. [2021-08-06 14:25:17,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,650 INFO L225 Difference]: With dead ends: 297 [2021-08-06 14:25:17,650 INFO L226 Difference]: Without dead ends: 297 [2021-08-06 14:25:17,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-06 14:25:17,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 201. [2021-08-06 14:25:17,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 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 14:25:17,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2021-08-06 14:25:17,656 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2021-08-06 14:25:17,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,656 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2021-08-06 14:25:17,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,656 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2021-08-06 14:25:17,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,657 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 14:25:17,657 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,657 INFO L82 PathProgramCache]: Analyzing trace with hash 575750895, now seen corresponding path program 3 times [2021-08-06 14:25:17,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,658 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114088275] [2021-08-06 14:25:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,658 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,693 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 14:25:17,694 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114088275] [2021-08-06 14:25:17,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114088275] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978662790] [2021-08-06 14:25:17,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,695 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,732 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2021-08-06 14:25:17,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,733 INFO L225 Difference]: With dead ends: 219 [2021-08-06 14:25:17,733 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 14:25:17,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.8ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 14:25:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2021-08-06 14:25:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9572192513368982) internal successors, (553), 187 states have internal predecessors, (553), 0 states have call successors, (0), 0 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 14:25:17,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 553 transitions. [2021-08-06 14:25:17,737 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 553 transitions. Word has length 19 [2021-08-06 14:25:17,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,737 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 553 transitions. [2021-08-06 14:25:17,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 553 transitions. [2021-08-06 14:25:17,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,738 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 14:25:17,738 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1371281447, now seen corresponding path program 3 times [2021-08-06 14:25:17,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553533189] [2021-08-06 14:25:17,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,806 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 14:25:17,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553533189] [2021-08-06 14:25:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553533189] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167964767] [2021-08-06 14:25:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,807 INFO L87 Difference]: Start difference. First operand 188 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,838 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2021-08-06 14:25:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,840 INFO L225 Difference]: With dead ends: 267 [2021-08-06 14:25:17,840 INFO L226 Difference]: Without dead ends: 267 [2021-08-06 14:25:17,840 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:17,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-08-06 14:25:17,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2021-08-06 14:25:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 14:25:17,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-06 14:25:17,844 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-08-06 14:25:17,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,844 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-06 14:25:17,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,844 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-06 14:25:17,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,845 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-06 14:25:17,845 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1379795667, now seen corresponding path program 4 times [2021-08-06 14:25:17,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036470946] [2021-08-06 14:25:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,886 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 14:25:17,886 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036470946] [2021-08-06 14:25:17,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036470946] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,887 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334068445] [2021-08-06 14:25:17,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,888 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:17,925 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2021-08-06 14:25:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:17,926 INFO L225 Difference]: With dead ends: 207 [2021-08-06 14:25:17,926 INFO L226 Difference]: Without dead ends: 195 [2021-08-06 14:25:17,926 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:17,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-06 14:25:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2021-08-06 14:25:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 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 14:25:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2021-08-06 14:25:17,930 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2021-08-06 14:25:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:17,931 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2021-08-06 14:25:17,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2021-08-06 14:25:17,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:17,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:17,931 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:17,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 14:25:17,931 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 699498161, now seen corresponding path program 5 times [2021-08-06 14:25:17,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:17,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635622560] [2021-08-06 14:25:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:17,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:17,973 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 14:25:17,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:17,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635622560] [2021-08-06 14:25:17,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635622560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:17,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:17,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:17,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655806970] [2021-08-06 14:25:17,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:17,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:17,975 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:18,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:18,010 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2021-08-06 14:25:18,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:18,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:18,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:18,011 INFO L225 Difference]: With dead ends: 214 [2021-08-06 14:25:18,011 INFO L226 Difference]: Without dead ends: 214 [2021-08-06 14:25:18,011 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.6ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:18,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-08-06 14:25:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2021-08-06 14:25:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 14:25:18,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-06 14:25:18,015 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-08-06 14:25:18,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:18,015 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-06 14:25:18,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:18,015 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-06 14:25:18,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-06 14:25:18,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:18,016 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:18,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-08-06 14:25:18,016 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:18,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:18,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1772583541, now seen corresponding path program 6 times [2021-08-06 14:25:18,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:18,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701413618] [2021-08-06 14:25:18,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:18,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:18,055 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 14:25:18,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:18,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701413618] [2021-08-06 14:25:18,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701413618] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 14:25:18,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 14:25:18,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 14:25:18,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539518452] [2021-08-06 14:25:18,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 14:25:18,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:18,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 14:25:18,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 14:25:18,056 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:18,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:18,079 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2021-08-06 14:25:18,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 14:25:18,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-06 14:25:18,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:18,081 INFO L225 Difference]: With dead ends: 208 [2021-08-06 14:25:18,081 INFO L226 Difference]: Without dead ends: 208 [2021-08-06 14:25:18,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.9ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 14:25:18,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-08-06 14:25:18,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2021-08-06 14:25:18,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 14:25:18,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2021-08-06 14:25:18,085 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2021-08-06 14:25:18,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:18,085 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2021-08-06 14:25:18,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:18,085 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2021-08-06 14:25:18,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 14:25:18,085 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:18,085 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] [2021-08-06 14:25:18,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 14:25:18,086 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:18,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:18,086 INFO L82 PathProgramCache]: Analyzing trace with hash -356903725, now seen corresponding path program 1 times [2021-08-06 14:25:18,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:18,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663587883] [2021-08-06 14:25:18,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:18,086 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:18,151 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663587883] [2021-08-06 14:25:18,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663587883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:18,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898767959] [2021-08-06 14:25:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:18,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:18,152 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 14:25:18,159 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 14:25:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:18,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 14:25:18,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:18,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898767959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:18,414 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:18,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-06 14:25:18,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145866961] [2021-08-06 14:25:18,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:25:18,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:18,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:25:18,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:18,415 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 14:25:18,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:18,502 INFO L93 Difference]: Finished difference Result 336 states and 974 transitions. [2021-08-06 14:25:18,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 14:25:18,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 14:25:18,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:18,503 INFO L225 Difference]: With dead ends: 336 [2021-08-06 14:25:18,503 INFO L226 Difference]: Without dead ends: 226 [2021-08-06 14:25:18,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-08-06 14:25:18,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-06 14:25:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 220. [2021-08-06 14:25:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.9269406392694064) internal successors, (641), 219 states have internal predecessors, (641), 0 states have call successors, (0), 0 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 14:25:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 641 transitions. [2021-08-06 14:25:18,508 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 641 transitions. Word has length 20 [2021-08-06 14:25:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 641 transitions. [2021-08-06 14:25:18,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 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 14:25:18,513 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 641 transitions. [2021-08-06 14:25:18,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-06 14:25:18,513 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:18,513 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:18,532 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 14:25:18,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-06 14:25:18,725 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:18,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:18,725 INFO L82 PathProgramCache]: Analyzing trace with hash -59516404, now seen corresponding path program 2 times [2021-08-06 14:25:18,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:18,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511860162] [2021-08-06 14:25:18,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:18,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:18,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:18,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:18,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511860162] [2021-08-06 14:25:18,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511860162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:18,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766371511] [2021-08-06 14:25:18,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:18,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:18,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:18,800 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 14:25:18,801 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 14:25:18,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:18,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:18,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 14:25:18,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:19,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:19,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766371511] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:19,038 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-08-06 14:25:19,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070685349] [2021-08-06 14:25:19,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 14:25:19,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:19,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 14:25:19,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-06 14:25:19,040 INFO L87 Difference]: Start difference. First operand 220 states and 641 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:19,103 INFO L93 Difference]: Finished difference Result 344 states and 1003 transitions. [2021-08-06 14:25:19,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 14:25:19,103 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-06 14:25:19,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:19,105 INFO L225 Difference]: With dead ends: 344 [2021-08-06 14:25:19,105 INFO L226 Difference]: Without dead ends: 251 [2021-08-06 14:25:19,105 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 14:25:19,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-06 14:25:19,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2021-08-06 14:25:19,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.932) internal successors, (733), 250 states have internal predecessors, (733), 0 states have call successors, (0), 0 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 14:25:19,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 733 transitions. [2021-08-06 14:25:19,110 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 733 transitions. Word has length 21 [2021-08-06 14:25:19,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:19,110 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 733 transitions. [2021-08-06 14:25:19,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,110 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 733 transitions. [2021-08-06 14:25:19,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 14:25:19,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:19,111 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:19,130 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 14:25:19,328 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,SelfDestructingSolverStorable17 [2021-08-06 14:25:19,328 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash 569555955, now seen corresponding path program 3 times [2021-08-06 14:25:19,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:19,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201142209] [2021-08-06 14:25:19,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:19,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:19,424 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 14:25:19,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:19,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201142209] [2021-08-06 14:25:19,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201142209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:19,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447282311] [2021-08-06 14:25:19,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:19,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:19,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:19,431 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 14:25:19,436 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 14:25:19,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-06 14:25:19,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:19,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447282311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:19,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:19,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-08-06 14:25:19,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129401634] [2021-08-06 14:25:19,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:25:19,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:19,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:25:19,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:25:19,679 INFO L87 Difference]: Start difference. First operand 251 states and 733 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:19,802 INFO L93 Difference]: Finished difference Result 398 states and 1158 transitions. [2021-08-06 14:25:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 14:25:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 14:25:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:19,803 INFO L225 Difference]: With dead ends: 398 [2021-08-06 14:25:19,804 INFO L226 Difference]: Without dead ends: 288 [2021-08-06 14:25:19,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-08-06 14:25:19,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2021-08-06 14:25:19,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 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 14:25:19,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2021-08-06 14:25:19,809 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 22 [2021-08-06 14:25:19,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:19,809 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2021-08-06 14:25:19,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2021-08-06 14:25:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-06 14:25:19,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:19,810 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:19,828 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 14:25:20,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:20,027 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:20,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1404037396, now seen corresponding path program 4 times [2021-08-06 14:25:20,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:20,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940784762] [2021-08-06 14:25:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:20,027 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:20,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:20,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940784762] [2021-08-06 14:25:20,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940784762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:20,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176878970] [2021-08-06 14:25:20,111 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:20,111 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:20,112 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 14:25:20,113 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 14:25:20,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:20,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-06 14:25:20,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:20,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 14:25:20,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176878970] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:20,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:20,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-08-06 14:25:20,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056510730] [2021-08-06 14:25:20,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 14:25:20,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:20,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 14:25:20,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-06 14:25:20,381 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 14:25:20,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:20,482 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2021-08-06 14:25:20,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 14:25:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-06 14:25:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:20,484 INFO L225 Difference]: With dead ends: 406 [2021-08-06 14:25:20,484 INFO L226 Difference]: Without dead ends: 313 [2021-08-06 14:25:20,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 158.3ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-06 14:25:20,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2021-08-06 14:25:20,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:20,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2021-08-06 14:25:20,489 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2021-08-06 14:25:20,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:20,489 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2021-08-06 14:25:20,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 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 14:25:20,490 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2021-08-06 14:25:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:20,490 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:20,490 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:20,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:20,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:20,705 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:20,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1839078163, now seen corresponding path program 5 times [2021-08-06 14:25:20,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:20,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180831144] [2021-08-06 14:25:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:20,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:20,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:20,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:20,953 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180831144] [2021-08-06 14:25:20,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180831144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:20,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762665381] [2021-08-06 14:25:20,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:20,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:20,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:20,969 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 14:25:20,969 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 14:25:21,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:25:21,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:21,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:21,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:21,237 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:21,237 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 39 treesize of output 36 [2021-08-06 14:25:21,553 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:21,553 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 27 treesize of output 26 [2021-08-06 14:25:21,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:25:21,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:21,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762665381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:21,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:21,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:21,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015899294] [2021-08-06 14:25:21,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:21,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:21,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:21,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:21,686 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:22,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:22,249 INFO L93 Difference]: Finished difference Result 547 states and 1591 transitions. [2021-08-06 14:25:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:22,249 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:22,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:22,251 INFO L225 Difference]: With dead ends: 547 [2021-08-06 14:25:22,251 INFO L226 Difference]: Without dead ends: 474 [2021-08-06 14:25:22,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:22,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-06 14:25:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 319. [2021-08-06 14:25:22,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.930817610062893) internal successors, (932), 318 states have internal predecessors, (932), 0 states have call successors, (0), 0 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 14:25:22,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 932 transitions. [2021-08-06 14:25:22,259 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 932 transitions. Word has length 24 [2021-08-06 14:25:22,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:22,259 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 932 transitions. [2021-08-06 14:25:22,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:22,259 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 932 transitions. [2021-08-06 14:25:22,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:22,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:22,260 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:22,282 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 14:25:22,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:22,481 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash -263182055, now seen corresponding path program 6 times [2021-08-06 14:25:22,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:22,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999909221] [2021-08-06 14:25:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:22,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:22,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:22,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999909221] [2021-08-06 14:25:22,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999909221] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:22,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630424264] [2021-08-06 14:25:22,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:22,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:22,737 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 14:25:22,738 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 14:25:22,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:25:22,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:22,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:22,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:23,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-06 14:25:23,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:25:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:23,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630424264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:23,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:23,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 14:25:23,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93485321] [2021-08-06 14:25:23,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:25:23,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:23,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:25:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:25:23,395 INFO L87 Difference]: Start difference. First operand 319 states and 932 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:23,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:23,605 INFO L93 Difference]: Finished difference Result 465 states and 1295 transitions. [2021-08-06 14:25:23,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:25:23,606 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:23,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:23,607 INFO L225 Difference]: With dead ends: 465 [2021-08-06 14:25:23,607 INFO L226 Difference]: Without dead ends: 434 [2021-08-06 14:25:23,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 229.9ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:23,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-06 14:25:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 335. [2021-08-06 14:25:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.910179640718563) internal successors, (972), 334 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 14:25:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 972 transitions. [2021-08-06 14:25:23,614 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 972 transitions. Word has length 24 [2021-08-06 14:25:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:23,614 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 972 transitions. [2021-08-06 14:25:23,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 972 transitions. [2021-08-06 14:25:23,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:23,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:23,615 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:23,631 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 14:25:23,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:23,832 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 900751119, now seen corresponding path program 7 times [2021-08-06 14:25:23,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:23,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265130293] [2021-08-06 14:25:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:23,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:24,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:24,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265130293] [2021-08-06 14:25:24,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265130293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:24,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939429588] [2021-08-06 14:25:24,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:24,090 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:24,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:24,091 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 14:25:24,092 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 14:25:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:24,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:24,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:24,427 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:24,427 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 47 treesize of output 42 [2021-08-06 14:25:24,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:25:24,614 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:24,614 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 40 treesize of output 35 [2021-08-06 14:25:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:24,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939429588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:24,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:24,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:24,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504693115] [2021-08-06 14:25:24,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:24,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:24,810 INFO L87 Difference]: Start difference. First operand 335 states and 972 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:25,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:25,168 INFO L93 Difference]: Finished difference Result 497 states and 1375 transitions. [2021-08-06 14:25:25,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:25,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:25,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:25,170 INFO L225 Difference]: With dead ends: 497 [2021-08-06 14:25:25,170 INFO L226 Difference]: Without dead ends: 462 [2021-08-06 14:25:25,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 330.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-06 14:25:25,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 335. [2021-08-06 14:25:25,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.910179640718563) internal successors, (972), 334 states have internal predecessors, (972), 0 states have call successors, (0), 0 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 14:25:25,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 972 transitions. [2021-08-06 14:25:25,184 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 972 transitions. Word has length 24 [2021-08-06 14:25:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:25,184 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 972 transitions. [2021-08-06 14:25:25,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 972 transitions. [2021-08-06 14:25:25,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:25,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:25,185 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:25,212 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 14:25:25,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:25,401 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:25,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:25,401 INFO L82 PathProgramCache]: Analyzing trace with hash -2022472717, now seen corresponding path program 8 times [2021-08-06 14:25:25,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:25,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786006474] [2021-08-06 14:25:25,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:25,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:25,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:25,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786006474] [2021-08-06 14:25:25,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786006474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:25,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724160433] [2021-08-06 14:25:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:25,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:25,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:25,633 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 14:25:25,634 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 14:25:25,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:25,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:25,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:25,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:26,061 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:26,061 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 47 treesize of output 42 [2021-08-06 14:25:26,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:26,407 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 27 treesize of output 26 [2021-08-06 14:25:26,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:25:26,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:26,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724160433] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:26,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:26,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:26,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022596294] [2021-08-06 14:25:26,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:26,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:26,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:26,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:26,523 INFO L87 Difference]: Start difference. First operand 335 states and 972 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:26,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:26,758 INFO L93 Difference]: Finished difference Result 414 states and 1160 transitions. [2021-08-06 14:25:26,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:26,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:26,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:26,760 INFO L225 Difference]: With dead ends: 414 [2021-08-06 14:25:26,760 INFO L226 Difference]: Without dead ends: 355 [2021-08-06 14:25:26,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:25:26,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-08-06 14:25:26,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 339. [2021-08-06 14:25:26,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.899408284023669) internal successors, (980), 338 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 14:25:26,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 980 transitions. [2021-08-06 14:25:26,765 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 980 transitions. Word has length 24 [2021-08-06 14:25:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:26,766 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 980 transitions. [2021-08-06 14:25:26,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 980 transitions. [2021-08-06 14:25:26,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:26,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:26,766 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:26,785 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 14:25:26,984 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,SelfDestructingSolverStorable23 [2021-08-06 14:25:26,984 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:26,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:26,985 INFO L82 PathProgramCache]: Analyzing trace with hash -858539543, now seen corresponding path program 9 times [2021-08-06 14:25:26,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:26,985 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935433556] [2021-08-06 14:25:26,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:26,985 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:26,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:27,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:27,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:27,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935433556] [2021-08-06 14:25:27,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935433556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:27,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040220513] [2021-08-06 14:25:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:27,222 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:27,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:27,223 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 14:25:27,255 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 14:25:27,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:27,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:27,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:27,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:27,721 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:27,722 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 39 treesize of output 36 [2021-08-06 14:25:27,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2021-08-06 14:25:27,817 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:27,818 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 40 treesize of output 35 [2021-08-06 14:25:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:28,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040220513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:28,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:28,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:28,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507308484] [2021-08-06 14:25:28,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:28,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:28,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:28,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:28,018 INFO L87 Difference]: Start difference. First operand 339 states and 980 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:28,215 INFO L93 Difference]: Finished difference Result 406 states and 1152 transitions. [2021-08-06 14:25:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:28,215 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:28,216 INFO L225 Difference]: With dead ends: 406 [2021-08-06 14:25:28,217 INFO L226 Difference]: Without dead ends: 371 [2021-08-06 14:25:28,217 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 283.8ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:25:28,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-08-06 14:25:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 339. [2021-08-06 14:25:28,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.899408284023669) internal successors, (980), 338 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 14:25:28,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 980 transitions. [2021-08-06 14:25:28,223 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 980 transitions. Word has length 24 [2021-08-06 14:25:28,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:28,223 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 980 transitions. [2021-08-06 14:25:28,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:28,223 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 980 transitions. [2021-08-06 14:25:28,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:28,224 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:28,224 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:28,241 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 14:25:28,441 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,SelfDestructingSolverStorable24 [2021-08-06 14:25:28,441 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:28,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash 617078035, now seen corresponding path program 10 times [2021-08-06 14:25:28,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:28,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258409333] [2021-08-06 14:25:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:28,441 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:28,722 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:28,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:28,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258409333] [2021-08-06 14:25:28,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258409333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:28,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810390543] [2021-08-06 14:25:28,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:28,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:28,723 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 14:25:28,731 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 14:25:28,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:28,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:28,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:28,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:25:29,256 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2021-08-06 14:25:29,262 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:29,262 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 40 treesize of output 35 [2021-08-06 14:25:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:29,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810390543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:29,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:29,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:29,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274975393] [2021-08-06 14:25:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:29,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:29,448 INFO L87 Difference]: Start difference. First operand 339 states and 980 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:29,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:29,753 INFO L93 Difference]: Finished difference Result 412 states and 1167 transitions. [2021-08-06 14:25:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:29,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:29,756 INFO L225 Difference]: With dead ends: 412 [2021-08-06 14:25:29,756 INFO L226 Difference]: Without dead ends: 373 [2021-08-06 14:25:29,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 298.8ms TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:25:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-06 14:25:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 339. [2021-08-06 14:25:29,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.899408284023669) internal successors, (980), 338 states have internal predecessors, (980), 0 states have call successors, (0), 0 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 14:25:29,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 980 transitions. [2021-08-06 14:25:29,762 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 980 transitions. Word has length 24 [2021-08-06 14:25:29,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:29,762 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 980 transitions. [2021-08-06 14:25:29,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:29,763 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 980 transitions. [2021-08-06 14:25:29,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:29,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:29,763 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:29,781 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 14:25:29,981 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,SelfDestructingSolverStorable25 [2021-08-06 14:25:29,981 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:29,981 INFO L82 PathProgramCache]: Analyzing trace with hash 2003695823, now seen corresponding path program 11 times [2021-08-06 14:25:29,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:29,981 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455444536] [2021-08-06 14:25:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:29,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:30,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:30,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455444536] [2021-08-06 14:25:30,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455444536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:30,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670459625] [2021-08-06 14:25:30,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:30,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:30,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:30,209 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 14:25:30,220 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 14:25:30,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:30,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:30,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:30,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:30,620 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 39 treesize of output 36 [2021-08-06 14:25:30,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-08-06 14:25:30,998 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:30,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-08-06 14:25:31,119 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:31,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670459625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:31,119 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:31,119 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:31,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832288089] [2021-08-06 14:25:31,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:31,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:31,120 INFO L87 Difference]: Start difference. First operand 339 states and 980 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:31,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:31,946 INFO L93 Difference]: Finished difference Result 741 states and 2073 transitions. [2021-08-06 14:25:31,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:31,946 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:31,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:31,949 INFO L225 Difference]: With dead ends: 741 [2021-08-06 14:25:31,949 INFO L226 Difference]: Without dead ends: 668 [2021-08-06 14:25:31,949 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 715.0ms TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:25:31,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-08-06 14:25:31,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 393. [2021-08-06 14:25:31,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 2.8903061224489797) internal successors, (1133), 392 states have internal predecessors, (1133), 0 states have call successors, (0), 0 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 14:25:31,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1133 transitions. [2021-08-06 14:25:31,956 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1133 transitions. Word has length 24 [2021-08-06 14:25:31,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:31,956 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 1133 transitions. [2021-08-06 14:25:31,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:31,956 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1133 transitions. [2021-08-06 14:25:31,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:31,957 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:31,957 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:31,976 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 14:25:32,172 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,SelfDestructingSolverStorable26 [2021-08-06 14:25:32,173 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:32,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:32,173 INFO L82 PathProgramCache]: Analyzing trace with hash -98564395, now seen corresponding path program 12 times [2021-08-06 14:25:32,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:32,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763112642] [2021-08-06 14:25:32,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:32,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:32,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:32,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763112642] [2021-08-06 14:25:32,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763112642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:32,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47542692] [2021-08-06 14:25:32,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:32,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:32,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:32,417 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 14:25:32,440 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 14:25:32,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:32,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:32,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:32,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:33,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:25:33,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:25:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:33,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47542692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:33,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:33,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:33,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583293382] [2021-08-06 14:25:33,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:33,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:33,277 INFO L87 Difference]: Start difference. First operand 393 states and 1133 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:33,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:33,667 INFO L93 Difference]: Finished difference Result 676 states and 1870 transitions. [2021-08-06 14:25:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:25:33,674 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:33,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:33,676 INFO L225 Difference]: With dead ends: 676 [2021-08-06 14:25:33,676 INFO L226 Difference]: Without dead ends: 645 [2021-08-06 14:25:33,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-08-06 14:25:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 395. [2021-08-06 14:25:33,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8883248730964466) internal successors, (1138), 394 states have internal predecessors, (1138), 0 states have call successors, (0), 0 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 14:25:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1138 transitions. [2021-08-06 14:25:33,684 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1138 transitions. Word has length 24 [2021-08-06 14:25:33,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:33,684 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 1138 transitions. [2021-08-06 14:25:33,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:33,684 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1138 transitions. [2021-08-06 14:25:33,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:33,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:33,685 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:33,705 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 14:25:33,892 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,SelfDestructingSolverStorable27 [2021-08-06 14:25:33,893 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:33,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:33,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1065368779, now seen corresponding path program 13 times [2021-08-06 14:25:33,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:33,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112941538] [2021-08-06 14:25:33,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:33,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:34,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:34,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:34,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112941538] [2021-08-06 14:25:34,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112941538] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:34,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111071482] [2021-08-06 14:25:34,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:34,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:34,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:34,153 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 14:25:34,181 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 14:25:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:34,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:34,670 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:34,670 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 39 treesize of output 36 [2021-08-06 14:25:34,982 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:34,983 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 43 treesize of output 40 [2021-08-06 14:25:34,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:25:34,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 14:25:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:35,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111071482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:35,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:35,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:35,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710230920] [2021-08-06 14:25:35,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:35,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:35,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:35,200 INFO L87 Difference]: Start difference. First operand 395 states and 1138 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:35,994 INFO L93 Difference]: Finished difference Result 710 states and 1951 transitions. [2021-08-06 14:25:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:35,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:35,996 INFO L225 Difference]: With dead ends: 710 [2021-08-06 14:25:35,996 INFO L226 Difference]: Without dead ends: 675 [2021-08-06 14:25:35,997 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 735.8ms TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:25:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-08-06 14:25:36,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 391. [2021-08-06 14:25:36,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.8974358974358974) internal successors, (1130), 390 states have internal predecessors, (1130), 0 states have call successors, (0), 0 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 14:25:36,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1130 transitions. [2021-08-06 14:25:36,004 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1130 transitions. Word has length 24 [2021-08-06 14:25:36,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:36,004 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 1130 transitions. [2021-08-06 14:25:36,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:36,004 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1130 transitions. [2021-08-06 14:25:36,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:36,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:36,005 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:36,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:36,220 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,SelfDestructingSolverStorable28 [2021-08-06 14:25:36,221 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:36,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:36,221 INFO L82 PathProgramCache]: Analyzing trace with hash 413850841, now seen corresponding path program 14 times [2021-08-06 14:25:36,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:36,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409263692] [2021-08-06 14:25:36,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:36,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:36,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:36,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409263692] [2021-08-06 14:25:36,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409263692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:36,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083678048] [2021-08-06 14:25:36,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:36,461 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:36,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:36,461 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 14:25:36,462 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 14:25:36,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:36,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:36,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:37,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:37,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:25:37,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:25:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:37,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083678048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:37,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:37,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:37,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655453446] [2021-08-06 14:25:37,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:37,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:37,541 INFO L87 Difference]: Start difference. First operand 391 states and 1130 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:38,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:38,166 INFO L93 Difference]: Finished difference Result 672 states and 1865 transitions. [2021-08-06 14:25:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:38,167 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:38,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:38,169 INFO L225 Difference]: With dead ends: 672 [2021-08-06 14:25:38,169 INFO L226 Difference]: Without dead ends: 586 [2021-08-06 14:25:38,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 713.0ms TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:25:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-08-06 14:25:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 406. [2021-08-06 14:25:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.903703703703704) internal successors, (1176), 405 states have internal predecessors, (1176), 0 states have call successors, (0), 0 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 14:25:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1176 transitions. [2021-08-06 14:25:38,176 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1176 transitions. Word has length 24 [2021-08-06 14:25:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:38,176 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1176 transitions. [2021-08-06 14:25:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1176 transitions. [2021-08-06 14:25:38,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:38,177 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:38,177 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:38,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:38,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:38,397 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1577784015, now seen corresponding path program 15 times [2021-08-06 14:25:38,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:38,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990721299] [2021-08-06 14:25:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:38,398 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:38,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:38,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990721299] [2021-08-06 14:25:38,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990721299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:38,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748940133] [2021-08-06 14:25:38,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:38,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:38,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:38,642 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 14:25:38,643 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 14:25:39,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:25:39,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:39,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:39,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:39,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:25:39,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:25:39,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:25:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748940133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:39,625 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:39,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:39,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143641435] [2021-08-06 14:25:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:39,626 INFO L87 Difference]: Start difference. First operand 406 states and 1176 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:40,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:40,234 INFO L93 Difference]: Finished difference Result 735 states and 2010 transitions. [2021-08-06 14:25:40,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:25:40,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:40,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:40,237 INFO L225 Difference]: With dead ends: 735 [2021-08-06 14:25:40,237 INFO L226 Difference]: Without dead ends: 647 [2021-08-06 14:25:40,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:25:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 647 states. [2021-08-06 14:25:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 647 to 408. [2021-08-06 14:25:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.901719901719902) internal successors, (1181), 407 states have internal predecessors, (1181), 0 states have call successors, (0), 0 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 14:25:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1181 transitions. [2021-08-06 14:25:40,244 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1181 transitions. Word has length 24 [2021-08-06 14:25:40,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:40,244 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1181 transitions. [2021-08-06 14:25:40,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:40,244 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1181 transitions. [2021-08-06 14:25:40,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:40,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:40,245 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:40,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 14:25:40,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:40,462 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:40,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:40,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1744441895, now seen corresponding path program 16 times [2021-08-06 14:25:40,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:40,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883517154] [2021-08-06 14:25:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:40,463 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:40,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:25:40,726 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:40,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883517154] [2021-08-06 14:25:40,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883517154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:40,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074522049] [2021-08-06 14:25:40,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:40,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:40,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:40,727 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 14:25:40,728 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 14:25:41,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:41,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:41,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:41,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:41,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:25:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:25:41,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074522049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:41,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:41,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:41,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338536940] [2021-08-06 14:25:41,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:41,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:41,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:41,833 INFO L87 Difference]: Start difference. First operand 408 states and 1181 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:42,355 INFO L93 Difference]: Finished difference Result 710 states and 2003 transitions. [2021-08-06 14:25:42,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:42,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:42,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:42,358 INFO L225 Difference]: With dead ends: 710 [2021-08-06 14:25:42,358 INFO L226 Difference]: Without dead ends: 660 [2021-08-06 14:25:42,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 487.3ms TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:25:42,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2021-08-06 14:25:42,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 404. [2021-08-06 14:25:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.923076923076923) internal successors, (1178), 403 states have internal predecessors, (1178), 0 states have call successors, (0), 0 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 14:25:42,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1178 transitions. [2021-08-06 14:25:42,365 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1178 transitions. Word has length 24 [2021-08-06 14:25:42,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:42,366 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 1178 transitions. [2021-08-06 14:25:42,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:42,366 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1178 transitions. [2021-08-06 14:25:42,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:42,366 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:42,366 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:42,386 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 14:25:42,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:42,567 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1861457099, now seen corresponding path program 17 times [2021-08-06 14:25:42,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:42,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405980891] [2021-08-06 14:25:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:42,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:42,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:42,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405980891] [2021-08-06 14:25:42,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405980891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:42,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395797876] [2021-08-06 14:25:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:42,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:42,869 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 14:25:42,892 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 14:25:43,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:25:43,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:43,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:43,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:43,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:25:43,718 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:43,719 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 46 treesize of output 43 [2021-08-06 14:25:43,726 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:43,726 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 43 treesize of output 38 [2021-08-06 14:25:44,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:44,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395797876] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:44,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:44,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:44,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873650954] [2021-08-06 14:25:44,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:44,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:44,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:44,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:44,008 INFO L87 Difference]: Start difference. First operand 404 states and 1178 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:44,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:44,878 INFO L93 Difference]: Finished difference Result 798 states and 2281 transitions. [2021-08-06 14:25:44,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:25:44,879 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:44,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:44,882 INFO L225 Difference]: With dead ends: 798 [2021-08-06 14:25:44,882 INFO L226 Difference]: Without dead ends: 732 [2021-08-06 14:25:44,882 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 769.7ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:25:44,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-06 14:25:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 407. [2021-08-06 14:25:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.9261083743842367) internal successors, (1188), 406 states have internal predecessors, (1188), 0 states have call successors, (0), 0 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 14:25:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1188 transitions. [2021-08-06 14:25:44,890 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1188 transitions. Word has length 24 [2021-08-06 14:25:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:44,890 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1188 transitions. [2021-08-06 14:25:44,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1188 transitions. [2021-08-06 14:25:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:44,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:44,891 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:44,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:45,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:45,105 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -160390989, now seen corresponding path program 18 times [2021-08-06 14:25:45,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:45,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404698503] [2021-08-06 14:25:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:45,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:45,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:45,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404698503] [2021-08-06 14:25:45,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404698503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:45,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404716281] [2021-08-06 14:25:45,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:45,364 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:45,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:45,365 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 14:25:45,365 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 14:25:45,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:25:45,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:45,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:45,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:46,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:25:46,237 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:46,237 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 46 treesize of output 43 [2021-08-06 14:25:46,244 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:46,244 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 43 treesize of output 38 [2021-08-06 14:25:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:46,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404716281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:46,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:46,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:46,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857221771] [2021-08-06 14:25:46,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:46,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:46,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:46,508 INFO L87 Difference]: Start difference. First operand 407 states and 1188 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:47,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:47,414 INFO L93 Difference]: Finished difference Result 680 states and 1905 transitions. [2021-08-06 14:25:47,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:25:47,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:47,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:47,417 INFO L225 Difference]: With dead ends: 680 [2021-08-06 14:25:47,417 INFO L226 Difference]: Without dead ends: 621 [2021-08-06 14:25:47,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 753.8ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:25:47,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-06 14:25:47,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 419. [2021-08-06 14:25:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.9210526315789473) internal successors, (1221), 418 states have internal predecessors, (1221), 0 states have call successors, (0), 0 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 14:25:47,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1221 transitions. [2021-08-06 14:25:47,423 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1221 transitions. Word has length 24 [2021-08-06 14:25:47,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:47,424 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 1221 transitions. [2021-08-06 14:25:47,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:47,424 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1221 transitions. [2021-08-06 14:25:47,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:47,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:47,424 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:47,442 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 14:25:47,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:47,642 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:47,642 INFO L82 PathProgramCache]: Analyzing trace with hash 977497711, now seen corresponding path program 19 times [2021-08-06 14:25:47,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:47,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660576416] [2021-08-06 14:25:47,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:47,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:47,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:47,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660576416] [2021-08-06 14:25:47,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660576416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:47,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65767223] [2021-08-06 14:25:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:25:47,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:47,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:47,849 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 14:25:47,852 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 14:25:48,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:48,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:48,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:48,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2021-08-06 14:25:48,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:25:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:48,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65767223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:48,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:48,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:25:48,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795617789] [2021-08-06 14:25:48,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:25:48,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:25:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:25:48,868 INFO L87 Difference]: Start difference. First operand 419 states and 1221 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:49,025 INFO L93 Difference]: Finished difference Result 499 states and 1427 transitions. [2021-08-06 14:25:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:49,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:49,027 INFO L225 Difference]: With dead ends: 499 [2021-08-06 14:25:49,027 INFO L226 Difference]: Without dead ends: 468 [2021-08-06 14:25:49,028 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 220.4ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:49,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-06 14:25:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 424. [2021-08-06 14:25:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9196217494089836) internal successors, (1235), 423 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 14:25:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1235 transitions. [2021-08-06 14:25:49,033 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1235 transitions. Word has length 24 [2021-08-06 14:25:49,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:49,033 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1235 transitions. [2021-08-06 14:25:49,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:49,033 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1235 transitions. [2021-08-06 14:25:49,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:49,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:49,034 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:49,057 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 14:25:49,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:49,248 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 2141430885, now seen corresponding path program 20 times [2021-08-06 14:25:49,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:49,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225950154] [2021-08-06 14:25:49,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:49,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:49,476 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:49,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:49,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225950154] [2021-08-06 14:25:49,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225950154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:49,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123641713] [2021-08-06 14:25:49,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:25:49,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:49,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:49,478 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 14:25:49,505 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 14:25:50,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:25:50,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:50,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:50,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:50,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-06 14:25:50,382 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:50,382 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 41 treesize of output 38 [2021-08-06 14:25:50,389 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:50,389 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 38 treesize of output 33 [2021-08-06 14:25:50,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:50,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123641713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:50,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:50,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:50,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319963064] [2021-08-06 14:25:50,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:50,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:50,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:50,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:50,712 INFO L87 Difference]: Start difference. First operand 424 states and 1235 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:51,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:51,360 INFO L93 Difference]: Finished difference Result 573 states and 1636 transitions. [2021-08-06 14:25:51,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:25:51,361 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:51,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:51,363 INFO L225 Difference]: With dead ends: 573 [2021-08-06 14:25:51,363 INFO L226 Difference]: Without dead ends: 524 [2021-08-06 14:25:51,363 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:25:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-06 14:25:51,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 424. [2021-08-06 14:25:51,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9196217494089836) internal successors, (1235), 423 states have internal predecessors, (1235), 0 states have call successors, (0), 0 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 14:25:51,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1235 transitions. [2021-08-06 14:25:51,371 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1235 transitions. Word has length 24 [2021-08-06 14:25:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:51,371 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1235 transitions. [2021-08-06 14:25:51,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1235 transitions. [2021-08-06 14:25:51,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:51,372 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:51,372 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:51,392 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 14:25:51,591 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,SelfDestructingSolverStorable35 [2021-08-06 14:25:51,592 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:51,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:51,592 INFO L82 PathProgramCache]: Analyzing trace with hash -677918833, now seen corresponding path program 21 times [2021-08-06 14:25:51,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:51,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417536632] [2021-08-06 14:25:51,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:51,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:51,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417536632] [2021-08-06 14:25:51,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417536632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:51,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777739104] [2021-08-06 14:25:51,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:25:51,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:51,872 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 14:25:51,873 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 14:25:52,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:25:52,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:52,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:52,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:52,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:25:52,830 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-08-06 14:25:52,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-06 14:25:52,911 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:52,911 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 48 treesize of output 39 [2021-08-06 14:25:53,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:53,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777739104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:53,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:53,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:53,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289197741] [2021-08-06 14:25:53,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:53,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:53,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:53,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:53,192 INFO L87 Difference]: Start difference. First operand 424 states and 1235 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:53,450 INFO L93 Difference]: Finished difference Result 497 states and 1408 transitions. [2021-08-06 14:25:53,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:25:53,450 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:53,452 INFO L225 Difference]: With dead ends: 497 [2021-08-06 14:25:53,452 INFO L226 Difference]: Without dead ends: 444 [2021-08-06 14:25:53,452 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 340.7ms TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:25:53,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2021-08-06 14:25:53,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 426. [2021-08-06 14:25:53,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 2.9176470588235293) internal successors, (1240), 425 states have internal predecessors, (1240), 0 states have call successors, (0), 0 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 14:25:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1240 transitions. [2021-08-06 14:25:53,457 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1240 transitions. Word has length 24 [2021-08-06 14:25:53,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:53,457 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1240 transitions. [2021-08-06 14:25:53,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:53,457 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1240 transitions. [2021-08-06 14:25:53,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:53,458 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:53,458 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:53,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 14:25:53,669 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,SelfDestructingSolverStorable36 [2021-08-06 14:25:53,669 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:53,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:53,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1952639283, now seen corresponding path program 22 times [2021-08-06 14:25:53,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:53,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199483567] [2021-08-06 14:25:53,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:53,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:53,922 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:53,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:53,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199483567] [2021-08-06 14:25:53,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199483567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:53,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193203286] [2021-08-06 14:25:53,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:25:53,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:53,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:53,924 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 14:25:53,924 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 14:25:54,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:25:54,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:54,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:54,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:54,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:25:55,332 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:55,333 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 24 [2021-08-06 14:25:55,338 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:25:55,338 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 19 treesize of output 18 [2021-08-06 14:25:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:55,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193203286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:55,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:55,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:25:55,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512603739] [2021-08-06 14:25:55,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:25:55,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:55,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:25:55,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:25:55,434 INFO L87 Difference]: Start difference. First operand 426 states and 1240 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:55,729 INFO L93 Difference]: Finished difference Result 551 states and 1569 transitions. [2021-08-06 14:25:55,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:25:55,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:55,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:55,731 INFO L225 Difference]: With dead ends: 551 [2021-08-06 14:25:55,731 INFO L226 Difference]: Without dead ends: 520 [2021-08-06 14:25:55,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 358.4ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:25:55,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-08-06 14:25:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 441. [2021-08-06 14:25:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.9272727272727272) internal successors, (1288), 440 states have internal predecessors, (1288), 0 states have call successors, (0), 0 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 14:25:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1288 transitions. [2021-08-06 14:25:55,737 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1288 transitions. Word has length 24 [2021-08-06 14:25:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:55,737 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 1288 transitions. [2021-08-06 14:25:55,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1288 transitions. [2021-08-06 14:25:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:55,738 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:55,738 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:55,760 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 14:25:55,956 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,SelfDestructingSolverStorable37 [2021-08-06 14:25:55,957 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1178394839, now seen corresponding path program 23 times [2021-08-06 14:25:55,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:55,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730677606] [2021-08-06 14:25:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:55,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:56,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730677606] [2021-08-06 14:25:56,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730677606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:56,226 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292473036] [2021-08-06 14:25:56,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:25:56,226 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:56,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:56,227 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 14:25:56,228 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 14:25:56,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:25:56,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:56,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:25:56,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:57,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:57,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:25:57,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:25:57,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:25:57,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:57,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292473036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:57,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:57,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:25:57,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090933466] [2021-08-06 14:25:57,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:25:57,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:25:57,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:25:57,441 INFO L87 Difference]: Start difference. First operand 441 states and 1288 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:57,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:57,720 INFO L93 Difference]: Finished difference Result 740 states and 2094 transitions. [2021-08-06 14:25:57,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:25:57,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:25:57,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:57,722 INFO L225 Difference]: With dead ends: 740 [2021-08-06 14:25:57,722 INFO L226 Difference]: Without dead ends: 678 [2021-08-06 14:25:57,723 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 322.0ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:25:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-08-06 14:25:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 447. [2021-08-06 14:25:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.9439461883408073) internal successors, (1313), 446 states have internal predecessors, (1313), 0 states have call successors, (0), 0 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 14:25:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1313 transitions. [2021-08-06 14:25:57,729 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1313 transitions. Word has length 24 [2021-08-06 14:25:57,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:57,729 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1313 transitions. [2021-08-06 14:25:57,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:25:57,729 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1313 transitions. [2021-08-06 14:25:57,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:57,730 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:57,730 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:57,751 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 14:25:57,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:57,937 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:57,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:57,937 INFO L82 PathProgramCache]: Analyzing trace with hash 716434735, now seen corresponding path program 24 times [2021-08-06 14:25:57,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:57,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832395984] [2021-08-06 14:25:57,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:57,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:25:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:58,178 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:25:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832395984] [2021-08-06 14:25:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832395984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894138479] [2021-08-06 14:25:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:25:58,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:25:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:25:58,180 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 14:25:58,180 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 14:25:58,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:25:58,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:25:58,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:25:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:25:59,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:25:59,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:25:59,466 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:25:59,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894138479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:25:59,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:25:59,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:25:59,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204404318] [2021-08-06 14:25:59,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:25:59,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:25:59,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:25:59,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:25:59,467 INFO L87 Difference]: Start difference. First operand 447 states and 1313 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:25:59,743 INFO L93 Difference]: Finished difference Result 585 states and 1660 transitions. [2021-08-06 14:25:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:25:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:25:59,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:25:59,745 INFO L225 Difference]: With dead ends: 585 [2021-08-06 14:25:59,745 INFO L226 Difference]: Without dead ends: 502 [2021-08-06 14:25:59,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 314.9ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:25:59,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-08-06 14:25:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 434. [2021-08-06 14:25:59,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.9214780600461894) internal successors, (1265), 433 states have internal predecessors, (1265), 0 states have call successors, (0), 0 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 14:25:59,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1265 transitions. [2021-08-06 14:25:59,751 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1265 transitions. Word has length 24 [2021-08-06 14:25:59,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:25:59,751 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 1265 transitions. [2021-08-06 14:25:59,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:25:59,751 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1265 transitions. [2021-08-06 14:25:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:25:59,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:25:59,752 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:25:59,774 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 14:25:59,970 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,SelfDestructingSolverStorable39 [2021-08-06 14:25:59,970 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:25:59,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:25:59,971 INFO L82 PathProgramCache]: Analyzing trace with hash 2041958899, now seen corresponding path program 25 times [2021-08-06 14:25:59,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:25:59,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719496939] [2021-08-06 14:25:59,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:25:59,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:25:59,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:00,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:00,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719496939] [2021-08-06 14:26:00,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719496939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:00,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876410990] [2021-08-06 14:26:00,229 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:00,229 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:00,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:00,230 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 14:26:00,230 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 14:26:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:01,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:01,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:01,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:26:01,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:01,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876410990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:01,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:01,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:01,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538967552] [2021-08-06 14:26:01,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:01,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:01,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:01,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:01,576 INFO L87 Difference]: Start difference. First operand 434 states and 1265 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:01,915 INFO L93 Difference]: Finished difference Result 647 states and 1827 transitions. [2021-08-06 14:26:01,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:26:01,915 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:01,917 INFO L225 Difference]: With dead ends: 647 [2021-08-06 14:26:01,917 INFO L226 Difference]: Without dead ends: 570 [2021-08-06 14:26:01,917 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 368.8ms TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:01,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-08-06 14:26:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 448. [2021-08-06 14:26:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 447 states have (on average 2.970917225950783) internal successors, (1328), 447 states have internal predecessors, (1328), 0 states have call successors, (0), 0 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 14:26:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 1328 transitions. [2021-08-06 14:26:01,923 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 1328 transitions. Word has length 24 [2021-08-06 14:26:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:01,923 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 1328 transitions. [2021-08-06 14:26:01,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 1328 transitions. [2021-08-06 14:26:01,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:01,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:01,925 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:01,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:02,140 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,SelfDestructingSolverStorable40 [2021-08-06 14:26:02,141 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash -894721755, now seen corresponding path program 26 times [2021-08-06 14:26:02,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:02,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684098019] [2021-08-06 14:26:02,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:02,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:02,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:02,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:02,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684098019] [2021-08-06 14:26:02,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684098019] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:02,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357360393] [2021-08-06 14:26:02,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:02,413 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:02,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:02,414 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 14:26:02,415 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 14:26:03,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:03,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:03,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:03,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:03,433 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:03,433 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 50 treesize of output 47 [2021-08-06 14:26:03,588 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:03,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2021-08-06 14:26:03,596 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:03,596 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 48 treesize of output 43 [2021-08-06 14:26:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:03,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357360393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:03,984 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:03,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:26:03,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486457895] [2021-08-06 14:26:03,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:03,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:03,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:03,985 INFO L87 Difference]: Start difference. First operand 448 states and 1328 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:04,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:04,733 INFO L93 Difference]: Finished difference Result 700 states and 1973 transitions. [2021-08-06 14:26:04,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:04,734 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:04,735 INFO L225 Difference]: With dead ends: 700 [2021-08-06 14:26:04,736 INFO L226 Difference]: Without dead ends: 612 [2021-08-06 14:26:04,736 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 633.4ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:26:04,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-06 14:26:04,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 469. [2021-08-06 14:26:04,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 2.9914529914529915) internal successors, (1400), 468 states have internal predecessors, (1400), 0 states have call successors, (0), 0 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 14:26:04,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1400 transitions. [2021-08-06 14:26:04,742 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1400 transitions. Word has length 24 [2021-08-06 14:26:04,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:04,742 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1400 transitions. [2021-08-06 14:26:04,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:04,743 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1400 transitions. [2021-08-06 14:26:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:04,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:04,743 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:04,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:04,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 14:26:04,953 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:04,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:04,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1529507877, now seen corresponding path program 27 times [2021-08-06 14:26:04,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:04,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37424550] [2021-08-06 14:26:04,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:04,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:04,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:05,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:05,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:05,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37424550] [2021-08-06 14:26:05,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37424550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:05,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116800950] [2021-08-06 14:26:05,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:05,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:05,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:05,228 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 14:26:05,231 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 14:26:06,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:26:06,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:06,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:06,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:26:06,435 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:06,435 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 46 treesize of output 43 [2021-08-06 14:26:06,441 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:06,441 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 43 treesize of output 38 [2021-08-06 14:26:06,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:06,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116800950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:06,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:06,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:26:06,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020268085] [2021-08-06 14:26:06,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:06,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:06,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:06,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:06,778 INFO L87 Difference]: Start difference. First operand 469 states and 1400 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:07,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:07,091 INFO L93 Difference]: Finished difference Result 608 states and 1764 transitions. [2021-08-06 14:26:07,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:07,092 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:07,093 INFO L225 Difference]: With dead ends: 608 [2021-08-06 14:26:07,093 INFO L226 Difference]: Without dead ends: 589 [2021-08-06 14:26:07,093 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 342.7ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-08-06 14:26:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 449. [2021-08-06 14:26:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.9754464285714284) internal successors, (1333), 448 states have internal predecessors, (1333), 0 states have call successors, (0), 0 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 14:26:07,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1333 transitions. [2021-08-06 14:26:07,099 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1333 transitions. Word has length 24 [2021-08-06 14:26:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:07,100 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1333 transitions. [2021-08-06 14:26:07,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1333 transitions. [2021-08-06 14:26:07,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:07,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:07,101 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:07,120 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 14:26:07,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:07,306 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -473987821, now seen corresponding path program 28 times [2021-08-06 14:26:07,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:07,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073291501] [2021-08-06 14:26:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:07,307 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:07,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:07,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:07,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073291501] [2021-08-06 14:26:07,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073291501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:07,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527751024] [2021-08-06 14:26:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:07,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:07,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:07,547 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 14:26:07,547 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 14:26:08,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:08,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:08,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:08,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:08,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:08,727 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 38 treesize of output 37 [2021-08-06 14:26:09,004 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:09,004 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 57 treesize of output 52 [2021-08-06 14:26:09,011 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:09,011 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 50 treesize of output 41 [2021-08-06 14:26:09,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:09,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527751024] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:09,273 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:09,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:26:09,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464206987] [2021-08-06 14:26:09,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:09,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:09,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:09,274 INFO L87 Difference]: Start difference. First operand 449 states and 1333 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:09,543 INFO L93 Difference]: Finished difference Result 527 states and 1523 transitions. [2021-08-06 14:26:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:09,549 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:09,550 INFO L225 Difference]: With dead ends: 527 [2021-08-06 14:26:09,550 INFO L226 Difference]: Without dead ends: 474 [2021-08-06 14:26:09,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 352.0ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:26:09,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-08-06 14:26:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 452. [2021-08-06 14:26:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 2.977827050997783) internal successors, (1343), 451 states have internal predecessors, (1343), 0 states have call successors, (0), 0 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 14:26:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 1343 transitions. [2021-08-06 14:26:09,556 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 1343 transitions. Word has length 24 [2021-08-06 14:26:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:09,557 INFO L470 AbstractCegarLoop]: Abstraction has 452 states and 1343 transitions. [2021-08-06 14:26:09,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:09,557 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 1343 transitions. [2021-08-06 14:26:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:09,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:09,557 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:09,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-06 14:26:09,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:09,758 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:09,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:09,758 INFO L82 PathProgramCache]: Analyzing trace with hash -165436977, now seen corresponding path program 29 times [2021-08-06 14:26:09,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:09,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564141190] [2021-08-06 14:26:09,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:09,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:10,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:10,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:10,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564141190] [2021-08-06 14:26:10,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564141190] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:10,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044498191] [2021-08-06 14:26:10,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:10,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:10,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:10,087 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 14:26:10,087 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 14:26:11,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:26:11,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:11,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:11,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:11,281 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:11,281 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 38 treesize of output 37 [2021-08-06 14:26:11,393 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:11,394 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 52 treesize of output 49 [2021-08-06 14:26:11,400 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:11,400 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 48 treesize of output 43 [2021-08-06 14:26:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044498191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:11,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:11,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:11,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064149934] [2021-08-06 14:26:11,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:11,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:11,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:11,651 INFO L87 Difference]: Start difference. First operand 452 states and 1343 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:12,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:12,217 INFO L93 Difference]: Finished difference Result 679 states and 1921 transitions. [2021-08-06 14:26:12,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:26:12,217 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:12,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:12,219 INFO L225 Difference]: With dead ends: 679 [2021-08-06 14:26:12,219 INFO L226 Difference]: Without dead ends: 617 [2021-08-06 14:26:12,219 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 581.0ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:26:12,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-08-06 14:26:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 467. [2021-08-06 14:26:12,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 466 states have (on average 3.0128755364806867) internal successors, (1404), 466 states have internal predecessors, (1404), 0 states have call successors, (0), 0 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 14:26:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 1404 transitions. [2021-08-06 14:26:12,226 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 1404 transitions. Word has length 24 [2021-08-06 14:26:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:12,226 INFO L470 AbstractCegarLoop]: Abstraction has 467 states and 1404 transitions. [2021-08-06 14:26:12,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 1404 transitions. [2021-08-06 14:26:12,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:12,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:12,228 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:12,249 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 14:26:12,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:12,428 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:12,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:12,428 INFO L82 PathProgramCache]: Analyzing trace with hash -738361741, now seen corresponding path program 30 times [2021-08-06 14:26:12,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:12,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744045339] [2021-08-06 14:26:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:12,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:12,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:12,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744045339] [2021-08-06 14:26:12,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744045339] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:12,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901544786] [2021-08-06 14:26:12,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:12,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:12,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:12,789 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 14:26:12,790 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 14:26:13,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:26:13,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:13,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:13,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:14,013 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:14,013 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 38 treesize of output 37 [2021-08-06 14:26:14,131 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:14,132 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 52 treesize of output 49 [2021-08-06 14:26:14,139 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:14,139 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 48 treesize of output 43 [2021-08-06 14:26:14,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:14,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901544786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:14,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:14,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:26:14,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597536876] [2021-08-06 14:26:14,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:14,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:14,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:14,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:14,495 INFO L87 Difference]: Start difference. First operand 467 states and 1404 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:26:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:15,751 INFO L93 Difference]: Finished difference Result 1245 states and 3428 transitions. [2021-08-06 14:26:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 14:26:15,752 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:26:15,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:15,754 INFO L225 Difference]: With dead ends: 1245 [2021-08-06 14:26:15,754 INFO L226 Difference]: Without dead ends: 1115 [2021-08-06 14:26:15,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1214.3ms TimeCoverageRelationStatistics Valid=183, Invalid=809, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:26:15,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-08-06 14:26:15,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 469. [2021-08-06 14:26:15,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 468 states have (on average 3.0384615384615383) internal successors, (1422), 468 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:15,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 1422 transitions. [2021-08-06 14:26:15,763 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 1422 transitions. Word has length 24 [2021-08-06 14:26:15,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:15,763 INFO L470 AbstractCegarLoop]: Abstraction has 469 states and 1422 transitions. [2021-08-06 14:26:15,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:26:15,763 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 1422 transitions. [2021-08-06 14:26:15,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:15,764 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:15,764 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:15,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-06 14:26:15,964 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,SelfDestructingSolverStorable45 [2021-08-06 14:26:15,964 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:15,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:15,965 INFO L82 PathProgramCache]: Analyzing trace with hash 630291485, now seen corresponding path program 31 times [2021-08-06 14:26:15,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:15,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813171434] [2021-08-06 14:26:15,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:15,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:16,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:16,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813171434] [2021-08-06 14:26:16,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813171434] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:16,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593827642] [2021-08-06 14:26:16,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:16,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:16,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:16,163 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 14:26:16,163 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 14:26:17,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:17,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:17,334 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:17,334 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 42 treesize of output 39 [2021-08-06 14:26:17,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:17,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593827642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:17,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:17,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:26:17,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397978581] [2021-08-06 14:26:17,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:17,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:17,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:17,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:17,890 INFO L87 Difference]: Start difference. First operand 469 states and 1422 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:18,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:18,193 INFO L93 Difference]: Finished difference Result 774 states and 2236 transitions. [2021-08-06 14:26:18,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:26:18,194 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:18,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:18,195 INFO L225 Difference]: With dead ends: 774 [2021-08-06 14:26:18,195 INFO L226 Difference]: Without dead ends: 701 [2021-08-06 14:26:18,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 326.6ms TimeCoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:18,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2021-08-06 14:26:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 489. [2021-08-06 14:26:18,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 488 states have (on average 3.0245901639344264) internal successors, (1476), 488 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 14:26:18,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 1476 transitions. [2021-08-06 14:26:18,202 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 1476 transitions. Word has length 24 [2021-08-06 14:26:18,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:18,202 INFO L470 AbstractCegarLoop]: Abstraction has 489 states and 1476 transitions. [2021-08-06 14:26:18,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 1476 transitions. [2021-08-06 14:26:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:18,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:18,203 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:18,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:18,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 14:26:18,404 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:18,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1471968733, now seen corresponding path program 32 times [2021-08-06 14:26:18,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:18,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171466095] [2021-08-06 14:26:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:18,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:18,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:18,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:18,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:18,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171466095] [2021-08-06 14:26:18,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171466095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:18,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401285650] [2021-08-06 14:26:18,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:18,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:18,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:18,613 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 14:26:18,614 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 14:26:19,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:19,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:19,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:19,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:19,827 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:19,827 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 42 treesize of output 39 [2021-08-06 14:26:20,350 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:20,350 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 24 [2021-08-06 14:26:20,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:20,453 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:20,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401285650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:20,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:20,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:20,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288790019] [2021-08-06 14:26:20,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:20,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:20,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:20,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:20,454 INFO L87 Difference]: Start difference. First operand 489 states and 1476 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:20,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:20,985 INFO L93 Difference]: Finished difference Result 766 states and 2209 transitions. [2021-08-06 14:26:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:26:20,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:20,986 INFO L225 Difference]: With dead ends: 766 [2021-08-06 14:26:20,986 INFO L226 Difference]: Without dead ends: 680 [2021-08-06 14:26:20,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 525.9ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:26:20,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-06 14:26:20,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 497. [2021-08-06 14:26:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.0201612903225805) internal successors, (1498), 496 states have internal predecessors, (1498), 0 states have call successors, (0), 0 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 14:26:20,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1498 transitions. [2021-08-06 14:26:20,993 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1498 transitions. Word has length 24 [2021-08-06 14:26:20,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:20,993 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1498 transitions. [2021-08-06 14:26:20,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:20,993 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1498 transitions. [2021-08-06 14:26:20,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:20,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:20,994 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:21,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:21,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:21,195 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -308035559, now seen corresponding path program 33 times [2021-08-06 14:26:21,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:21,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696932808] [2021-08-06 14:26:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:21,195 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:21,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:21,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696932808] [2021-08-06 14:26:21,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696932808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:21,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50995905] [2021-08-06 14:26:21,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:21,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:21,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:21,399 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 14:26:21,410 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 14:26:22,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:22,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:22,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:22,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:22,721 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:22,722 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 42 treesize of output 39 [2021-08-06 14:26:23,071 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:23,072 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 41 treesize of output 38 [2021-08-06 14:26:23,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:26:23,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:23,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50995905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:23,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:23,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:23,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417540972] [2021-08-06 14:26:23,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:23,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:23,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:23,248 INFO L87 Difference]: Start difference. First operand 497 states and 1498 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:23,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:23,974 INFO L93 Difference]: Finished difference Result 827 states and 2367 transitions. [2021-08-06 14:26:23,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:23,976 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:23,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:23,978 INFO L225 Difference]: With dead ends: 827 [2021-08-06 14:26:23,978 INFO L226 Difference]: Without dead ends: 753 [2021-08-06 14:26:23,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 680.7ms TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:26:23,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-08-06 14:26:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-08-06 14:26:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.024193548387097) internal successors, (1500), 496 states have internal predecessors, (1500), 0 states have call successors, (0), 0 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 14:26:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1500 transitions. [2021-08-06 14:26:23,986 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1500 transitions. Word has length 24 [2021-08-06 14:26:23,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:23,986 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1500 transitions. [2021-08-06 14:26:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1500 transitions. [2021-08-06 14:26:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:23,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:23,987 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:24,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-06 14:26:24,200 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,SelfDestructingSolverStorable48 [2021-08-06 14:26:24,201 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:24,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1852273891, now seen corresponding path program 34 times [2021-08-06 14:26:24,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:24,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127085853] [2021-08-06 14:26:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:24,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:24,393 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:24,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:24,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127085853] [2021-08-06 14:26:24,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127085853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:24,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261746786] [2021-08-06 14:26:24,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:24,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:24,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:24,397 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 14:26:24,428 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 14:26:25,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:25,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:25,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:25,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:25,705 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:25,706 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 42 treesize of output 39 [2021-08-06 14:26:26,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:26,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261746786] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:26,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:26,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:26:26,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132612886] [2021-08-06 14:26:26,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:26,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:26,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:26,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:26,255 INFO L87 Difference]: Start difference. First operand 497 states and 1500 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:26,625 INFO L93 Difference]: Finished difference Result 1111 states and 3096 transitions. [2021-08-06 14:26:26,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:26:26,625 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:26,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:26,627 INFO L225 Difference]: With dead ends: 1111 [2021-08-06 14:26:26,627 INFO L226 Difference]: Without dead ends: 963 [2021-08-06 14:26:26,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 383.1ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:26:26,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-08-06 14:26:26,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 504. [2021-08-06 14:26:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0238568588469183) internal successors, (1521), 503 states have internal predecessors, (1521), 0 states have call successors, (0), 0 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 14:26:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1521 transitions. [2021-08-06 14:26:26,636 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1521 transitions. Word has length 24 [2021-08-06 14:26:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:26,636 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1521 transitions. [2021-08-06 14:26:26,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:26,636 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1521 transitions. [2021-08-06 14:26:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:26,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:26,637 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:26,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-06 14:26:26,842 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,SelfDestructingSolverStorable49 [2021-08-06 14:26:26,842 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:26,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:26,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1312087331, now seen corresponding path program 35 times [2021-08-06 14:26:26,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:26,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293896687] [2021-08-06 14:26:26,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:26,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:26,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:26,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293896687] [2021-08-06 14:26:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293896687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:26,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942673103] [2021-08-06 14:26:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:26,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:26,996 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 14:26:26,997 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 14:26:28,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:26:28,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:28,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:28,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:28,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:28,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:26:28,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:28,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942673103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:28,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:28,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:26:28,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888529625] [2021-08-06 14:26:28,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:28,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:28,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:28,562 INFO L87 Difference]: Start difference. First operand 504 states and 1521 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:28,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:28,794 INFO L93 Difference]: Finished difference Result 853 states and 2528 transitions. [2021-08-06 14:26:28,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:26:28,795 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:28,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:28,796 INFO L225 Difference]: With dead ends: 853 [2021-08-06 14:26:28,796 INFO L226 Difference]: Without dead ends: 822 [2021-08-06 14:26:28,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:28,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-06 14:26:28,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 504. [2021-08-06 14:26:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 503 states have (on average 3.0238568588469183) internal successors, (1521), 503 states have internal predecessors, (1521), 0 states have call successors, (0), 0 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 14:26:28,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 1521 transitions. [2021-08-06 14:26:28,804 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 1521 transitions. Word has length 24 [2021-08-06 14:26:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:28,804 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 1521 transitions. [2021-08-06 14:26:28,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:28,804 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 1521 transitions. [2021-08-06 14:26:28,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:28,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:28,805 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:28,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-06 14:26:29,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:29,021 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash -959553497, now seen corresponding path program 36 times [2021-08-06 14:26:29,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:29,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817479034] [2021-08-06 14:26:29,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:29,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:29,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:29,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817479034] [2021-08-06 14:26:29,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817479034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:29,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753613687] [2021-08-06 14:26:29,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:29,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:29,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:29,237 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 14:26:29,238 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 14:26:30,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:26:30,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:30,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:30,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:30,626 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:30,627 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 45 treesize of output 42 [2021-08-06 14:26:31,723 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:31,723 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 28 treesize of output 27 [2021-08-06 14:26:31,729 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:31,729 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 19 treesize of output 18 [2021-08-06 14:26:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:31,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753613687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:31,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:31,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:31,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344297818] [2021-08-06 14:26:31,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:31,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:31,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:31,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:31,806 INFO L87 Difference]: Start difference. First operand 504 states and 1521 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:32,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:32,544 INFO L93 Difference]: Finished difference Result 878 states and 2546 transitions. [2021-08-06 14:26:32,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:26:32,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:32,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:32,546 INFO L225 Difference]: With dead ends: 878 [2021-08-06 14:26:32,546 INFO L226 Difference]: Without dead ends: 820 [2021-08-06 14:26:32,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:26:32,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-08-06 14:26:32,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 519. [2021-08-06 14:26:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.028957528957529) internal successors, (1569), 518 states have internal predecessors, (1569), 0 states have call successors, (0), 0 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 14:26:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1569 transitions. [2021-08-06 14:26:32,554 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1569 transitions. Word has length 24 [2021-08-06 14:26:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:32,554 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1569 transitions. [2021-08-06 14:26:32,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1569 transitions. [2021-08-06 14:26:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:32,555 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:32,555 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:32,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-06 14:26:32,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:32,757 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:32,757 INFO L82 PathProgramCache]: Analyzing trace with hash 204379677, now seen corresponding path program 37 times [2021-08-06 14:26:32,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:32,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279579595] [2021-08-06 14:26:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:32,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:32,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:32,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279579595] [2021-08-06 14:26:32,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279579595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:32,970 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791654714] [2021-08-06 14:26:32,970 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:32,970 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:32,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:32,973 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 14:26:33,004 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 14:26:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:34,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:34,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:34,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:26:34,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:26:34,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:34,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791654714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:34,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:34,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:34,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089074062] [2021-08-06 14:26:34,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:34,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:34,823 INFO L87 Difference]: Start difference. First operand 519 states and 1569 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:35,346 INFO L93 Difference]: Finished difference Result 907 states and 2598 transitions. [2021-08-06 14:26:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:26:35,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:35,349 INFO L225 Difference]: With dead ends: 907 [2021-08-06 14:26:35,349 INFO L226 Difference]: Without dead ends: 819 [2021-08-06 14:26:35,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 538.7ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:26:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2021-08-06 14:26:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 509. [2021-08-06 14:26:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.0354330708661417) internal successors, (1542), 508 states have internal predecessors, (1542), 0 states have call successors, (0), 0 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 14:26:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1542 transitions. [2021-08-06 14:26:35,357 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1542 transitions. Word has length 24 [2021-08-06 14:26:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:35,357 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1542 transitions. [2021-08-06 14:26:35,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:35,357 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1542 transitions. [2021-08-06 14:26:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:35,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:35,358 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:35,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-06 14:26:35,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:35,561 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:35,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:35,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1177121063, now seen corresponding path program 38 times [2021-08-06 14:26:35,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:35,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619925596] [2021-08-06 14:26:35,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:35,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:35,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:35,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:35,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:35,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619925596] [2021-08-06 14:26:35,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619925596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:35,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837858769] [2021-08-06 14:26:35,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:35,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:35,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:35,794 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 14:26:35,794 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 14:26:37,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:37,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:37,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:37,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:37,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:37,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:26:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837858769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:37,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:37,743 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:26:37,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33481099] [2021-08-06 14:26:37,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:37,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:37,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:37,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:37,744 INFO L87 Difference]: Start difference. First operand 509 states and 1542 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:38,245 INFO L93 Difference]: Finished difference Result 927 states and 2701 transitions. [2021-08-06 14:26:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:26:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:38,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:38,247 INFO L225 Difference]: With dead ends: 927 [2021-08-06 14:26:38,247 INFO L226 Difference]: Without dead ends: 813 [2021-08-06 14:26:38,247 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:26:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-08-06 14:26:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 526. [2021-08-06 14:26:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.0438095238095237) internal successors, (1598), 525 states have internal predecessors, (1598), 0 states have call successors, (0), 0 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 14:26:38,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1598 transitions. [2021-08-06 14:26:38,255 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1598 transitions. Word has length 24 [2021-08-06 14:26:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:38,255 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1598 transitions. [2021-08-06 14:26:38,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1598 transitions. [2021-08-06 14:26:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:38,256 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:38,256 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:38,278 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 14:26:38,475 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,SelfDestructingSolverStorable53 [2021-08-06 14:26:38,476 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:38,476 INFO L82 PathProgramCache]: Analyzing trace with hash 488052761, now seen corresponding path program 39 times [2021-08-06 14:26:38,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:38,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635407789] [2021-08-06 14:26:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:38,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:38,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:38,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:38,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:38,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635407789] [2021-08-06 14:26:38,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635407789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:38,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704878938] [2021-08-06 14:26:38,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:38,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:38,759 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 14:26:38,759 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 14:26:40,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:40,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:40,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:26:40,469 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:40,469 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 46 treesize of output 43 [2021-08-06 14:26:40,475 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:26:40,475 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 43 treesize of output 38 [2021-08-06 14:26:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:40,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704878938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:40,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:40,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:40,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675778788] [2021-08-06 14:26:40,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:40,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:40,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:40,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:40,735 INFO L87 Difference]: Start difference. First operand 526 states and 1598 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:41,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:41,604 INFO L93 Difference]: Finished difference Result 1076 states and 3140 transitions. [2021-08-06 14:26:41,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:26:41,604 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:41,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:41,606 INFO L225 Difference]: With dead ends: 1076 [2021-08-06 14:26:41,607 INFO L226 Difference]: Without dead ends: 1010 [2021-08-06 14:26:41,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 745.8ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:26:41,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2021-08-06 14:26:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 541. [2021-08-06 14:26:41,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 3.0722222222222224) internal successors, (1659), 540 states have internal predecessors, (1659), 0 states have call successors, (0), 0 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 14:26:41,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1659 transitions. [2021-08-06 14:26:41,616 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1659 transitions. Word has length 24 [2021-08-06 14:26:41,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:41,616 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1659 transitions. [2021-08-06 14:26:41,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1659 transitions. [2021-08-06 14:26:41,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:41,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:41,617 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:41,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:41,832 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,SelfDestructingSolverStorable54 [2021-08-06 14:26:41,833 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1533795327, now seen corresponding path program 40 times [2021-08-06 14:26:41,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:41,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225866798] [2021-08-06 14:26:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:41,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:42,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:42,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:42,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225866798] [2021-08-06 14:26:42,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225866798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:42,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972941] [2021-08-06 14:26:42,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:42,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:42,036 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 14:26:42,037 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 14:26:43,496 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:26:43,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:43,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:43,567 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:43,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:26:43,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:26:43,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:26:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:43,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972941] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:43,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:43,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:26:43,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31745044] [2021-08-06 14:26:43,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:26:43,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:26:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:43,974 INFO L87 Difference]: Start difference. First operand 541 states and 1659 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:44,716 INFO L93 Difference]: Finished difference Result 958 states and 2776 transitions. [2021-08-06 14:26:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:26:44,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:26:44,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:44,718 INFO L225 Difference]: With dead ends: 958 [2021-08-06 14:26:44,718 INFO L226 Difference]: Without dead ends: 865 [2021-08-06 14:26:44,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 684.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:26:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2021-08-06 14:26:44,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 545. [2021-08-06 14:26:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 3.0643382352941178) internal successors, (1667), 544 states have internal predecessors, (1667), 0 states have call successors, (0), 0 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 14:26:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1667 transitions. [2021-08-06 14:26:44,726 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1667 transitions. Word has length 24 [2021-08-06 14:26:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:44,727 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1667 transitions. [2021-08-06 14:26:44,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:26:44,727 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1667 transitions. [2021-08-06 14:26:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:44,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:44,728 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:44,751 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 14:26:44,940 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,SelfDestructingSolverStorable55 [2021-08-06 14:26:44,941 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1806771059, now seen corresponding path program 41 times [2021-08-06 14:26:44,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:44,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112635368] [2021-08-06 14:26:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:44,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:45,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:45,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:45,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112635368] [2021-08-06 14:26:45,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112635368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:45,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894635922] [2021-08-06 14:26:45,168 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:26:45,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:45,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:45,169 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 14:26:45,188 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 14:26:46,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:26:46,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:46,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:46,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:46,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:26:47,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:47,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894635922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:47,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:47,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:26:47,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297827906] [2021-08-06 14:26:47,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:26:47,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:47,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:26:47,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:26:47,201 INFO L87 Difference]: Start difference. First operand 545 states and 1667 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:47,441 INFO L93 Difference]: Finished difference Result 835 states and 2470 transitions. [2021-08-06 14:26:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:47,443 INFO L225 Difference]: With dead ends: 835 [2021-08-06 14:26:47,443 INFO L226 Difference]: Without dead ends: 797 [2021-08-06 14:26:47,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 265.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 797 states. [2021-08-06 14:26:47,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 797 to 528. [2021-08-06 14:26:47,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 3.0246679316888048) internal successors, (1594), 527 states have internal predecessors, (1594), 0 states have call successors, (0), 0 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 14:26:47,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1594 transitions. [2021-08-06 14:26:47,451 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1594 transitions. Word has length 24 [2021-08-06 14:26:47,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:47,451 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1594 transitions. [2021-08-06 14:26:47,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:47,451 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1594 transitions. [2021-08-06 14:26:47,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:47,452 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:47,452 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:47,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 14:26:47,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-06 14:26:47,669 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:47,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:47,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1582657373, now seen corresponding path program 42 times [2021-08-06 14:26:47,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:47,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988905341] [2021-08-06 14:26:47,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:47,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:47,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:47,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988905341] [2021-08-06 14:26:47,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988905341] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:47,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547896558] [2021-08-06 14:26:47,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:26:47,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:47,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:47,815 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 14:26:47,817 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 14:26:49,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:26:49,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:49,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:49,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:49,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:26:49,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-08-06 14:26:49,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-08-06 14:26:49,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:49,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547896558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:49,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:49,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:26:49,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768896618] [2021-08-06 14:26:49,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:49,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:49,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:49,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:49,690 INFO L87 Difference]: Start difference. First operand 528 states and 1594 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:49,914 INFO L93 Difference]: Finished difference Result 660 states and 1970 transitions. [2021-08-06 14:26:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:26:49,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:49,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:49,916 INFO L225 Difference]: With dead ends: 660 [2021-08-06 14:26:49,916 INFO L226 Difference]: Without dead ends: 601 [2021-08-06 14:26:49,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:49,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-06 14:26:49,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 542. [2021-08-06 14:26:49,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.024029574861368) internal successors, (1636), 541 states have internal predecessors, (1636), 0 states have call successors, (0), 0 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 14:26:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1636 transitions. [2021-08-06 14:26:49,922 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1636 transitions. Word has length 24 [2021-08-06 14:26:49,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:49,923 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1636 transitions. [2021-08-06 14:26:49,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:49,923 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1636 transitions. [2021-08-06 14:26:49,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:49,923 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:49,923 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:49,945 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 14:26:50,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:50,124 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:50,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:50,124 INFO L82 PathProgramCache]: Analyzing trace with hash 496636455, now seen corresponding path program 43 times [2021-08-06 14:26:50,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:50,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619052186] [2021-08-06 14:26:50,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:50,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:50,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:50,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619052186] [2021-08-06 14:26:50,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619052186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:50,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038519181] [2021-08-06 14:26:50,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:26:50,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:50,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:50,272 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 14:26:50,273 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 14:26:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:26:51,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:52,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:26:52,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:52,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:52,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038519181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:52,358 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:52,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:26:52,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891637889] [2021-08-06 14:26:52,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:52,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:52,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:52,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:52,358 INFO L87 Difference]: Start difference. First operand 542 states and 1636 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:52,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:52,598 INFO L93 Difference]: Finished difference Result 646 states and 1942 transitions. [2021-08-06 14:26:52,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:52,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:52,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:52,599 INFO L225 Difference]: With dead ends: 646 [2021-08-06 14:26:52,600 INFO L226 Difference]: Without dead ends: 615 [2021-08-06 14:26:52,600 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:52,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-06 14:26:52,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 535. [2021-08-06 14:26:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 3.0243445692883895) internal successors, (1615), 534 states have internal predecessors, (1615), 0 states have call successors, (0), 0 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 14:26:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1615 transitions. [2021-08-06 14:26:52,608 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1615 transitions. Word has length 24 [2021-08-06 14:26:52,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:52,608 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 1615 transitions. [2021-08-06 14:26:52,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:52,608 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1615 transitions. [2021-08-06 14:26:52,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:52,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:52,609 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:52,632 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 14:26:52,809 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,SelfDestructingSolverStorable58 [2021-08-06 14:26:52,809 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:52,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:52,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1652160081, now seen corresponding path program 44 times [2021-08-06 14:26:52,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:52,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934399161] [2021-08-06 14:26:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:52,810 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:52,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:52,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:52,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934399161] [2021-08-06 14:26:52,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934399161] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:52,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739737836] [2021-08-06 14:26:52,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:26:52,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:52,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:52,961 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 14:26:53,000 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 14:26:54,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:26:54,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:54,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:54,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:54,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:26:54,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739737836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:55,007 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:55,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:26:55,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922420768] [2021-08-06 14:26:55,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:26:55,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:26:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:26:55,008 INFO L87 Difference]: Start difference. First operand 535 states and 1615 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:55,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:55,202 INFO L93 Difference]: Finished difference Result 676 states and 2009 transitions. [2021-08-06 14:26:55,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:26:55,203 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:55,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:55,204 INFO L225 Difference]: With dead ends: 676 [2021-08-06 14:26:55,204 INFO L226 Difference]: Without dead ends: 616 [2021-08-06 14:26:55,204 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:26:55,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-08-06 14:26:55,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 564. [2021-08-06 14:26:55,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 563 states have (on average 3.0213143872113677) internal successors, (1701), 563 states have internal predecessors, (1701), 0 states have call successors, (0), 0 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 14:26:55,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 1701 transitions. [2021-08-06 14:26:55,211 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 1701 transitions. Word has length 24 [2021-08-06 14:26:55,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:55,211 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 1701 transitions. [2021-08-06 14:26:55,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:55,211 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 1701 transitions. [2021-08-06 14:26:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:55,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:55,212 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:55,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 14:26:55,412 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,SelfDestructingSolverStorable59 [2021-08-06 14:26:55,412 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:55,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:55,413 INFO L82 PathProgramCache]: Analyzing trace with hash 257836915, now seen corresponding path program 45 times [2021-08-06 14:26:55,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:55,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205629450] [2021-08-06 14:26:55,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:55,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:55,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:55,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:55,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205629450] [2021-08-06 14:26:55,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205629450] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:55,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582336142] [2021-08-06 14:26:55,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:26:55,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:55,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:55,634 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 14:26:55,635 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 14:26:57,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:26:57,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:26:57,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:26:57,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:26:57,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:26:57,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:26:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:57,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582336142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:57,787 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:26:57,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:26:57,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845096676] [2021-08-06 14:26:57,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:26:57,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:26:57,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:26:57,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:26:57,788 INFO L87 Difference]: Start difference. First operand 564 states and 1701 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:58,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:26:58,108 INFO L93 Difference]: Finished difference Result 699 states and 2058 transitions. [2021-08-06 14:26:58,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:26:58,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:26:58,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:26:58,110 INFO L225 Difference]: With dead ends: 699 [2021-08-06 14:26:58,110 INFO L226 Difference]: Without dead ends: 640 [2021-08-06 14:26:58,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:26:58,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-06 14:26:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 574. [2021-08-06 14:26:58,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.033158813263525) internal successors, (1738), 573 states have internal predecessors, (1738), 0 states have call successors, (0), 0 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 14:26:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1738 transitions. [2021-08-06 14:26:58,117 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1738 transitions. Word has length 24 [2021-08-06 14:26:58,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:26:58,117 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 1738 transitions. [2021-08-06 14:26:58,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:26:58,117 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1738 transitions. [2021-08-06 14:26:58,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:26:58,118 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:26:58,118 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:26:58,139 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 14:26:58,325 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,SelfDestructingSolverStorable60 [2021-08-06 14:26:58,326 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:26:58,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:26:58,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1421770089, now seen corresponding path program 46 times [2021-08-06 14:26:58,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:26:58,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830605656] [2021-08-06 14:26:58,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:26:58,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:26:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:26:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:26:58,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:26:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830605656] [2021-08-06 14:26:58,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830605656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:26:58,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013261781] [2021-08-06 14:26:58,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:26:58,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:26:58,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:26:58,586 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 14:26:58,588 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 14:27:00,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:00,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:00,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:00,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:00,463 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:00,463 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 45 treesize of output 42 [2021-08-06 14:27:01,058 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:01,059 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 44 treesize of output 41 [2021-08-06 14:27:01,064 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:01,065 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 38 treesize of output 33 [2021-08-06 14:27:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:01,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013261781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:01,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:01,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:27:01,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40797829] [2021-08-06 14:27:01,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:01,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:01,310 INFO L87 Difference]: Start difference. First operand 574 states and 1738 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:01,645 INFO L93 Difference]: Finished difference Result 738 states and 2153 transitions. [2021-08-06 14:27:01,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:01,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:01,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:01,646 INFO L225 Difference]: With dead ends: 738 [2021-08-06 14:27:01,646 INFO L226 Difference]: Without dead ends: 691 [2021-08-06 14:27:01,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:01,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-06 14:27:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 584. [2021-08-06 14:27:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.020583190394511) internal successors, (1761), 583 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 14:27:01,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1761 transitions. [2021-08-06 14:27:01,654 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1761 transitions. Word has length 24 [2021-08-06 14:27:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1761 transitions. [2021-08-06 14:27:01,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:01,655 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1761 transitions. [2021-08-06 14:27:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:01,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:01,655 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:01,677 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 14:27:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:01,856 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:01,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:01,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1900455821, now seen corresponding path program 47 times [2021-08-06 14:27:01,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:01,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004598614] [2021-08-06 14:27:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:01,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:27:02,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:02,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004598614] [2021-08-06 14:27:02,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004598614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:02,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812179424] [2021-08-06 14:27:02,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:02,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:02,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:02,075 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 14:27:02,076 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 14:27:03,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:27:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:03,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:27:03,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:03,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:04,335 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:04,335 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 33 treesize of output 30 [2021-08-06 14:27:04,341 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:04,341 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 26 [2021-08-06 14:27:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:27:04,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812179424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:04,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:04,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:04,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754970775] [2021-08-06 14:27:04,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:04,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:04,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:04,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:04,488 INFO L87 Difference]: Start difference. First operand 584 states and 1761 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:04,802 INFO L93 Difference]: Finished difference Result 728 states and 2121 transitions. [2021-08-06 14:27:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:04,803 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:04,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:04,804 INFO L225 Difference]: With dead ends: 728 [2021-08-06 14:27:04,804 INFO L226 Difference]: Without dead ends: 661 [2021-08-06 14:27:04,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 325.7ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:27:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-08-06 14:27:04,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 591. [2021-08-06 14:27:04,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.0203389830508476) internal successors, (1782), 590 states have internal predecessors, (1782), 0 states have call successors, (0), 0 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 14:27:04,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1782 transitions. [2021-08-06 14:27:04,811 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1782 transitions. Word has length 24 [2021-08-06 14:27:04,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:04,811 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1782 transitions. [2021-08-06 14:27:04,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:04,811 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1782 transitions. [2021-08-06 14:27:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:04,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:04,812 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:04,833 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 14:27:05,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:05,013 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:05,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:05,013 INFO L82 PathProgramCache]: Analyzing trace with hash 347156531, now seen corresponding path program 48 times [2021-08-06 14:27:05,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:05,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848694611] [2021-08-06 14:27:05,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:05,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:05,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:05,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:05,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:05,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848694611] [2021-08-06 14:27:05,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848694611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:05,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274690561] [2021-08-06 14:27:05,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:05,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:05,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:05,237 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 14:27:05,238 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 14:27:07,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:27:07,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:07,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:07,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:07,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:07,547 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:07,548 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 30 treesize of output 29 [2021-08-06 14:27:07,554 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:07,554 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 24 treesize of output 23 [2021-08-06 14:27:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:07,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274690561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:07,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:07,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:27:07,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777426250] [2021-08-06 14:27:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:07,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:07,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:07,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:07,712 INFO L87 Difference]: Start difference. First operand 591 states and 1782 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:08,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:08,029 INFO L93 Difference]: Finished difference Result 817 states and 2441 transitions. [2021-08-06 14:27:08,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:08,030 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:08,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:08,031 INFO L225 Difference]: With dead ends: 817 [2021-08-06 14:27:08,031 INFO L226 Difference]: Without dead ends: 759 [2021-08-06 14:27:08,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 326.4ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:08,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2021-08-06 14:27:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 584. [2021-08-06 14:27:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.020583190394511) internal successors, (1761), 583 states have internal predecessors, (1761), 0 states have call successors, (0), 0 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 14:27:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1761 transitions. [2021-08-06 14:27:08,039 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1761 transitions. Word has length 24 [2021-08-06 14:27:08,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:08,039 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1761 transitions. [2021-08-06 14:27:08,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:08,040 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1761 transitions. [2021-08-06 14:27:08,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:08,040 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:08,041 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:08,064 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 14:27:08,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:08,249 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1705443173, now seen corresponding path program 49 times [2021-08-06 14:27:08,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:08,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759456263] [2021-08-06 14:27:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:08,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:08,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759456263] [2021-08-06 14:27:08,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759456263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487929044] [2021-08-06 14:27:08,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:08,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:08,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:08,498 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 14:27:08,498 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 14:27:10,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:10,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:10,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:10,458 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:10,459 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 45 treesize of output 42 [2021-08-06 14:27:10,670 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:10,670 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 49 treesize of output 46 [2021-08-06 14:27:10,677 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:10,677 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 41 treesize of output 36 [2021-08-06 14:27:10,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:10,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487929044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:10,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:10,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:10,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340939489] [2021-08-06 14:27:10,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:10,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:10,925 INFO L87 Difference]: Start difference. First operand 584 states and 1761 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:11,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:11,636 INFO L93 Difference]: Finished difference Result 1013 states and 2957 transitions. [2021-08-06 14:27:11,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:27:11,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:11,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:11,638 INFO L225 Difference]: With dead ends: 1013 [2021-08-06 14:27:11,638 INFO L226 Difference]: Without dead ends: 947 [2021-08-06 14:27:11,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2021-08-06 14:27:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 599. [2021-08-06 14:27:11,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.0468227424749164) internal successors, (1822), 598 states have internal predecessors, (1822), 0 states have call successors, (0), 0 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 14:27:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1822 transitions. [2021-08-06 14:27:11,646 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1822 transitions. Word has length 24 [2021-08-06 14:27:11,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:11,646 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1822 transitions. [2021-08-06 14:27:11,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:11,646 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1822 transitions. [2021-08-06 14:27:11,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:11,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:11,647 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:11,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 14:27:11,848 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,SelfDestructingSolverStorable64 [2021-08-06 14:27:11,848 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:11,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2084066715, now seen corresponding path program 50 times [2021-08-06 14:27:11,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:11,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260526383] [2021-08-06 14:27:11,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:11,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:11,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:12,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:12,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260526383] [2021-08-06 14:27:12,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260526383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:12,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701007792] [2021-08-06 14:27:12,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:12,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:12,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:12,157 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 14:27:12,191 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 14:27:13,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:13,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:13,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:13,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:14,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:14,207 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:14,207 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 46 treesize of output 43 [2021-08-06 14:27:14,213 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:14,213 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 43 treesize of output 38 [2021-08-06 14:27:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:14,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701007792] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:14,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:14,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:14,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584161039] [2021-08-06 14:27:14,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:14,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:14,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:14,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:14,539 INFO L87 Difference]: Start difference. First operand 599 states and 1822 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:15,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:15,055 INFO L93 Difference]: Finished difference Result 1042 states and 2995 transitions. [2021-08-06 14:27:15,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:27:15,055 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:15,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:15,057 INFO L225 Difference]: With dead ends: 1042 [2021-08-06 14:27:15,057 INFO L226 Difference]: Without dead ends: 953 [2021-08-06 14:27:15,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:27:15,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-08-06 14:27:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 603. [2021-08-06 14:27:15,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 602 states have (on average 3.068106312292359) internal successors, (1847), 602 states have internal predecessors, (1847), 0 states have call successors, (0), 0 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 14:27:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 1847 transitions. [2021-08-06 14:27:15,065 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 1847 transitions. Word has length 24 [2021-08-06 14:27:15,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:15,066 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 1847 transitions. [2021-08-06 14:27:15,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 1847 transitions. [2021-08-06 14:27:15,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:15,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:15,067 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:15,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-06 14:27:15,274 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,SelfDestructingSolverStorable65 [2021-08-06 14:27:15,274 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:15,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:15,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1256679231, now seen corresponding path program 51 times [2021-08-06 14:27:15,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:15,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352945159] [2021-08-06 14:27:15,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:15,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:15,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:15,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:15,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352945159] [2021-08-06 14:27:15,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352945159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:15,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011955300] [2021-08-06 14:27:15,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:15,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:15,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:15,474 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 14:27:15,474 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 14:27:17,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:27:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:17,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-08-06 14:27:17,519 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:17,519 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 30 treesize of output 29 [2021-08-06 14:27:17,524 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:17,525 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 24 treesize of output 23 [2021-08-06 14:27:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:17,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011955300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:17,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:17,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:17,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476454213] [2021-08-06 14:27:17,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:17,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:17,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:17,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:17,755 INFO L87 Difference]: Start difference. First operand 603 states and 1847 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:27:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:17,992 INFO L93 Difference]: Finished difference Result 756 states and 2275 transitions. [2021-08-06 14:27:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:27:17,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:27:17,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:17,994 INFO L225 Difference]: With dead ends: 756 [2021-08-06 14:27:17,994 INFO L226 Difference]: Without dead ends: 721 [2021-08-06 14:27:17,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-06 14:27:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 586. [2021-08-06 14:27:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.017094017094017) internal successors, (1765), 585 states have internal predecessors, (1765), 0 states have call successors, (0), 0 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 14:27:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1765 transitions. [2021-08-06 14:27:18,001 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1765 transitions. Word has length 24 [2021-08-06 14:27:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:18,001 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1765 transitions. [2021-08-06 14:27:18,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:27:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1765 transitions. [2021-08-06 14:27:18,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:18,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:18,002 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:18,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-08-06 14:27:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-06 14:27:18,203 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:18,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:18,203 INFO L82 PathProgramCache]: Analyzing trace with hash -873204247, now seen corresponding path program 52 times [2021-08-06 14:27:18,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:18,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421492386] [2021-08-06 14:27:18,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:18,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:18,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:18,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421492386] [2021-08-06 14:27:18,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421492386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:18,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845313564] [2021-08-06 14:27:18,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:18,437 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:18,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:18,440 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 14:27:18,440 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 14:27:20,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:20,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:20,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:20,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:20,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:27:20,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:27:20,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:27:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:20,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845313564] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:20,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:20,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:27:20,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741997268] [2021-08-06 14:27:20,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:27:20,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:20,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:27:20,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:27:20,761 INFO L87 Difference]: Start difference. First operand 586 states and 1765 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:20,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:20,968 INFO L93 Difference]: Finished difference Result 802 states and 2372 transitions. [2021-08-06 14:27:20,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:27:20,968 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:20,970 INFO L225 Difference]: With dead ends: 802 [2021-08-06 14:27:20,970 INFO L226 Difference]: Without dead ends: 740 [2021-08-06 14:27:20,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 232.1ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:20,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2021-08-06 14:27:20,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 593. [2021-08-06 14:27:20,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.0287162162162162) internal successors, (1793), 592 states have internal predecessors, (1793), 0 states have call successors, (0), 0 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 14:27:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1793 transitions. [2021-08-06 14:27:20,977 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1793 transitions. Word has length 24 [2021-08-06 14:27:20,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:20,977 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1793 transitions. [2021-08-06 14:27:20,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:20,977 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1793 transitions. [2021-08-06 14:27:20,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:20,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:20,978 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:21,001 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 14:27:21,178 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,SelfDestructingSolverStorable67 [2021-08-06 14:27:21,179 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:21,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:21,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1454965027, now seen corresponding path program 53 times [2021-08-06 14:27:21,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:21,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931928888] [2021-08-06 14:27:21,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:21,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:21,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:21,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931928888] [2021-08-06 14:27:21,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931928888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:21,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693805570] [2021-08-06 14:27:21,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:21,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:21,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:21,451 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 14:27:21,451 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 14:27:23,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:27:23,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:23,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:23,611 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:23,611 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 37 treesize of output 34 [2021-08-06 14:27:23,715 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:23,715 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 49 treesize of output 46 [2021-08-06 14:27:23,721 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:23,721 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 46 treesize of output 41 [2021-08-06 14:27:24,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:24,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693805570] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:24,082 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:24,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:24,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590758682] [2021-08-06 14:27:24,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:24,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:24,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:24,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:24,082 INFO L87 Difference]: Start difference. First operand 593 states and 1793 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:24,601 INFO L93 Difference]: Finished difference Result 1032 states and 3027 transitions. [2021-08-06 14:27:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:24,603 INFO L225 Difference]: With dead ends: 1032 [2021-08-06 14:27:24,603 INFO L226 Difference]: Without dead ends: 939 [2021-08-06 14:27:24,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:24,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2021-08-06 14:27:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 612. [2021-08-06 14:27:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 3.060556464811784) internal successors, (1870), 611 states have internal predecessors, (1870), 0 states have call successors, (0), 0 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 14:27:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 1870 transitions. [2021-08-06 14:27:24,612 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 1870 transitions. Word has length 24 [2021-08-06 14:27:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:24,612 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 1870 transitions. [2021-08-06 14:27:24,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 1870 transitions. [2021-08-06 14:27:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:24,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:24,613 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:24,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 14:27:24,817 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,SelfDestructingSolverStorable68 [2021-08-06 14:27:24,817 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:24,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:24,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1044985101, now seen corresponding path program 54 times [2021-08-06 14:27:24,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:24,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248180881] [2021-08-06 14:27:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:24,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:25,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:25,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:25,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248180881] [2021-08-06 14:27:25,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248180881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:25,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104640720] [2021-08-06 14:27:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:25,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:25,066 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 14:27:25,067 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 14:27:27,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:27:27,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:27,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:27,267 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:27,268 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 37 treesize of output 34 [2021-08-06 14:27:27,425 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:27,426 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 33 treesize of output 32 [2021-08-06 14:27:27,432 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:27,432 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 23 treesize of output 22 [2021-08-06 14:27:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:27,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104640720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:27,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:27,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:27,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415730355] [2021-08-06 14:27:27,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:27,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:27,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:27,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:27,639 INFO L87 Difference]: Start difference. First operand 612 states and 1870 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:28,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:28,225 INFO L93 Difference]: Finished difference Result 874 states and 2599 transitions. [2021-08-06 14:27:28,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:28,229 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:28,230 INFO L225 Difference]: With dead ends: 874 [2021-08-06 14:27:28,231 INFO L226 Difference]: Without dead ends: 812 [2021-08-06 14:27:28,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:27:28,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-08-06 14:27:28,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 596. [2021-08-06 14:27:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 3.0285714285714285) internal successors, (1802), 595 states have internal predecessors, (1802), 0 states have call successors, (0), 0 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 14:27:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1802 transitions. [2021-08-06 14:27:28,238 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1802 transitions. Word has length 24 [2021-08-06 14:27:28,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:28,238 INFO L470 AbstractCegarLoop]: Abstraction has 596 states and 1802 transitions. [2021-08-06 14:27:28,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:28,238 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1802 transitions. [2021-08-06 14:27:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:28,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:28,239 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:28,262 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 14:27:28,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 14:27:28,440 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash 61894819, now seen corresponding path program 55 times [2021-08-06 14:27:28,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:28,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619817859] [2021-08-06 14:27:28,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:28,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:28,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:28,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619817859] [2021-08-06 14:27:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619817859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:28,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398120690] [2021-08-06 14:27:28,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:28,684 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:28,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:28,685 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 14:27:28,686 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 14:27:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:30,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 31 [2021-08-06 14:27:30,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:27:30,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:27:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:30,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398120690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:30,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:30,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:30,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601110770] [2021-08-06 14:27:30,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:30,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:30,974 INFO L87 Difference]: Start difference. First operand 596 states and 1802 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:31,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:31,141 INFO L93 Difference]: Finished difference Result 665 states and 1975 transitions. [2021-08-06 14:27:31,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:27:31,142 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:31,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:31,143 INFO L225 Difference]: With dead ends: 665 [2021-08-06 14:27:31,143 INFO L226 Difference]: Without dead ends: 634 [2021-08-06 14:27:31,143 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-08-06 14:27:31,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 602. [2021-08-06 14:27:31,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.026622296173045) internal successors, (1819), 601 states have internal predecessors, (1819), 0 states have call successors, (0), 0 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 14:27:31,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1819 transitions. [2021-08-06 14:27:31,149 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1819 transitions. Word has length 24 [2021-08-06 14:27:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:31,150 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1819 transitions. [2021-08-06 14:27:31,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1819 transitions. [2021-08-06 14:27:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:31,151 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:31,151 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:31,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-06 14:27:31,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:31,373 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1225827993, now seen corresponding path program 56 times [2021-08-06 14:27:31,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:31,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987113576] [2021-08-06 14:27:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:31,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:31,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:31,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987113576] [2021-08-06 14:27:31,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987113576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:31,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654080284] [2021-08-06 14:27:31,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:31,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:31,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:31,569 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 14:27:31,569 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 14:27:33,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:33,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:33,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:33,790 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:33,790 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 45 treesize of output 42 [2021-08-06 14:27:33,941 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:33,941 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 49 treesize of output 46 [2021-08-06 14:27:33,948 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:33,948 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 40 treesize of output 35 [2021-08-06 14:27:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:34,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654080284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:34,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:34,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:34,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420729732] [2021-08-06 14:27:34,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:34,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:34,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:34,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:34,216 INFO L87 Difference]: Start difference. First operand 602 states and 1819 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:34,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:34,718 INFO L93 Difference]: Finished difference Result 723 states and 2144 transitions. [2021-08-06 14:27:34,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:27:34,719 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:34,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:34,720 INFO L225 Difference]: With dead ends: 723 [2021-08-06 14:27:34,720 INFO L226 Difference]: Without dead ends: 674 [2021-08-06 14:27:34,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:34,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-08-06 14:27:34,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 600. [2021-08-06 14:27:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.028380634390651) internal successors, (1814), 599 states have internal predecessors, (1814), 0 states have call successors, (0), 0 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 14:27:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1814 transitions. [2021-08-06 14:27:34,727 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1814 transitions. Word has length 24 [2021-08-06 14:27:34,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:34,727 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1814 transitions. [2021-08-06 14:27:34,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:34,727 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1814 transitions. [2021-08-06 14:27:34,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:34,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:34,728 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:34,751 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 14:27:34,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:34,937 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:34,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:34,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1593521725, now seen corresponding path program 57 times [2021-08-06 14:27:34,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:34,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229244552] [2021-08-06 14:27:34,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:34,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:34,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:35,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:35,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229244552] [2021-08-06 14:27:35,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229244552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:35,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618052139] [2021-08-06 14:27:35,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:35,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:35,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:35,144 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 14:27:35,145 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 14:27:37,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 14:27:37,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:27:37,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:37,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 14:27:37,457 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-08-06 14:27:37,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2021-08-06 14:27:37,533 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:37,533 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 48 treesize of output 39 [2021-08-06 14:27:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:37,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618052139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:37,781 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:37,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:37,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172384929] [2021-08-06 14:27:37,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:37,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:37,781 INFO L87 Difference]: Start difference. First operand 600 states and 1814 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:37,983 INFO L93 Difference]: Finished difference Result 661 states and 1951 transitions. [2021-08-06 14:27:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:27:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:37,985 INFO L225 Difference]: With dead ends: 661 [2021-08-06 14:27:37,985 INFO L226 Difference]: Without dead ends: 608 [2021-08-06 14:27:37,985 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-08-06 14:27:37,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 598. [2021-08-06 14:27:37,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.030150753768844) internal successors, (1809), 597 states have internal predecessors, (1809), 0 states have call successors, (0), 0 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 14:27:37,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1809 transitions. [2021-08-06 14:27:37,992 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1809 transitions. Word has length 24 [2021-08-06 14:27:37,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:37,992 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1809 transitions. [2021-08-06 14:27:37,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:37,992 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1809 transitions. [2021-08-06 14:27:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:37,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:37,993 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:38,016 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 14:27:38,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:38,193 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:38,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1037036391, now seen corresponding path program 58 times [2021-08-06 14:27:38,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:38,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872222281] [2021-08-06 14:27:38,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:38,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:38,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:38,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872222281] [2021-08-06 14:27:38,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872222281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:38,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879205096] [2021-08-06 14:27:38,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:38,429 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:38,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:38,430 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 14:27:38,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 14:27:40,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:27:40,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:40,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:40,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:40,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:41,128 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:41,128 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 33 treesize of output 30 [2021-08-06 14:27:41,133 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:41,133 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 31 treesize of output 26 [2021-08-06 14:27:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879205096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:41,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:41,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040923671] [2021-08-06 14:27:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:41,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:41,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:41,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:41,207 INFO L87 Difference]: Start difference. First operand 598 states and 1809 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:41,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:41,600 INFO L93 Difference]: Finished difference Result 754 states and 2206 transitions. [2021-08-06 14:27:41,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:27:41,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:41,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:41,602 INFO L225 Difference]: With dead ends: 754 [2021-08-06 14:27:41,602 INFO L226 Difference]: Without dead ends: 696 [2021-08-06 14:27:41,602 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:41,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-08-06 14:27:41,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 613. [2021-08-06 14:27:41,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 613 states, 612 states have (on average 3.034313725490196) internal successors, (1857), 612 states have internal predecessors, (1857), 0 states have call successors, (0), 0 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 14:27:41,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 613 states to 613 states and 1857 transitions. [2021-08-06 14:27:41,610 INFO L78 Accepts]: Start accepts. Automaton has 613 states and 1857 transitions. Word has length 24 [2021-08-06 14:27:41,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:41,610 INFO L470 AbstractCegarLoop]: Abstraction has 613 states and 1857 transitions. [2021-08-06 14:27:41,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:41,611 INFO L276 IsEmpty]: Start isEmpty. Operand 613 states and 1857 transitions. [2021-08-06 14:27:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:41,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:41,611 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:41,637 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 14:27:41,832 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,SelfDestructingSolverStorable73 [2021-08-06 14:27:41,833 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:41,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:41,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2093997731, now seen corresponding path program 59 times [2021-08-06 14:27:41,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:41,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725574808] [2021-08-06 14:27:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:41,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:42,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:42,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725574808] [2021-08-06 14:27:42,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725574808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:42,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449791577] [2021-08-06 14:27:42,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:27:42,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:42,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:42,066 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:42,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 14:27:44,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:27:44,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:44,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:44,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:44,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:27:44,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:27:44,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:27:44,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:27:44,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:44,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449791577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:44,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:44,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:44,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553912165] [2021-08-06 14:27:44,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:44,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:44,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:44,595 INFO L87 Difference]: Start difference. First operand 613 states and 1857 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:44,882 INFO L93 Difference]: Finished difference Result 900 states and 2627 transitions. [2021-08-06 14:27:44,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:27:44,882 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:44,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:44,883 INFO L225 Difference]: With dead ends: 900 [2021-08-06 14:27:44,883 INFO L226 Difference]: Without dead ends: 838 [2021-08-06 14:27:44,884 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 272.1ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:27:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-08-06 14:27:44,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 619. [2021-08-06 14:27:44,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 618 states have (on average 3.045307443365696) internal successors, (1882), 618 states have internal predecessors, (1882), 0 states have call successors, (0), 0 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 14:27:44,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 1882 transitions. [2021-08-06 14:27:44,891 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 1882 transitions. Word has length 24 [2021-08-06 14:27:44,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:44,891 INFO L470 AbstractCegarLoop]: Abstraction has 619 states and 1882 transitions. [2021-08-06 14:27:44,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:44,892 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 1882 transitions. [2021-08-06 14:27:44,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:44,892 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:44,893 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:44,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 14:27:45,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 14:27:45,103 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:45,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:45,103 INFO L82 PathProgramCache]: Analyzing trace with hash -199168157, now seen corresponding path program 60 times [2021-08-06 14:27:45,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:45,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815663088] [2021-08-06 14:27:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:45,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:45,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:45,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:45,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815663088] [2021-08-06 14:27:45,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815663088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:45,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079037192] [2021-08-06 14:27:45,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:27:45,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:45,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:45,347 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:45,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 14:27:47,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:27:47,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:47,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:47,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:27:47,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:27:47,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:27:47,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:47,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079037192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:47,782 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:47,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:47,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915085796] [2021-08-06 14:27:47,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:47,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:47,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:47,782 INFO L87 Difference]: Start difference. First operand 619 states and 1882 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:48,153 INFO L93 Difference]: Finished difference Result 749 states and 2203 transitions. [2021-08-06 14:27:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 14:27:48,154 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:48,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:48,155 INFO L225 Difference]: With dead ends: 749 [2021-08-06 14:27:48,155 INFO L226 Difference]: Without dead ends: 666 [2021-08-06 14:27:48,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:27:48,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-08-06 14:27:48,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 606. [2021-08-06 14:27:48,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.031404958677686) internal successors, (1834), 605 states have internal predecessors, (1834), 0 states have call successors, (0), 0 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 14:27:48,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1834 transitions. [2021-08-06 14:27:48,162 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1834 transitions. Word has length 24 [2021-08-06 14:27:48,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:48,162 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1834 transitions. [2021-08-06 14:27:48,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:48,162 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1834 transitions. [2021-08-06 14:27:48,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:48,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:48,163 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:48,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:48,363 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:48,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1126356007, now seen corresponding path program 61 times [2021-08-06 14:27:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:48,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720474603] [2021-08-06 14:27:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:48,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:48,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:48,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:48,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720474603] [2021-08-06 14:27:48,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720474603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:48,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581656569] [2021-08-06 14:27:48,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:27:48,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:48,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:48,584 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:48,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 14:27:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:50,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:50,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:50,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:27:51,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:27:51,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:27:51,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:51,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581656569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:51,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:51,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:27:51,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111996887] [2021-08-06 14:27:51,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:27:51,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:27:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:27:51,256 INFO L87 Difference]: Start difference. First operand 606 states and 1834 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:51,524 INFO L93 Difference]: Finished difference Result 811 states and 2370 transitions. [2021-08-06 14:27:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:27:51,524 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:27:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:51,525 INFO L225 Difference]: With dead ends: 811 [2021-08-06 14:27:51,525 INFO L226 Difference]: Without dead ends: 734 [2021-08-06 14:27:51,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:27:51,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2021-08-06 14:27:51,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 599. [2021-08-06 14:27:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.031772575250836) internal successors, (1813), 598 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 14:27:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1813 transitions. [2021-08-06 14:27:51,532 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1813 transitions. Word has length 24 [2021-08-06 14:27:51,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:51,533 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1813 transitions. [2021-08-06 14:27:51,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:51,533 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1813 transitions. [2021-08-06 14:27:51,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:51,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:51,534 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:51,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-08-06 14:27:51,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:51,737 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1810324647, now seen corresponding path program 62 times [2021-08-06 14:27:51,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:51,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230888160] [2021-08-06 14:27:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:51,737 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:52,073 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:52,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230888160] [2021-08-06 14:27:52,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230888160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:52,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725730437] [2021-08-06 14:27:52,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:27:52,073 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:52,074 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:52,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 14:27:54,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:27:54,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:54,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:54,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:54,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:54,469 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:54,469 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 46 treesize of output 43 [2021-08-06 14:27:54,478 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:54,478 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 43 treesize of output 38 [2021-08-06 14:27:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:54,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725730437] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:54,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:54,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:54,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032521738] [2021-08-06 14:27:54,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:54,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:54,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:54,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:54,842 INFO L87 Difference]: Start difference. First operand 599 states and 1813 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:55,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:55,431 INFO L93 Difference]: Finished difference Result 932 states and 2661 transitions. [2021-08-06 14:27:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:27:55,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:55,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:55,433 INFO L225 Difference]: With dead ends: 932 [2021-08-06 14:27:55,433 INFO L226 Difference]: Without dead ends: 839 [2021-08-06 14:27:55,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 560.6ms TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:27:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-08-06 14:27:55,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 614. [2021-08-06 14:27:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 3.0570962479608483) internal successors, (1874), 613 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:27:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 1874 transitions. [2021-08-06 14:27:55,441 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 1874 transitions. Word has length 24 [2021-08-06 14:27:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:55,441 INFO L470 AbstractCegarLoop]: Abstraction has 614 states and 1874 transitions. [2021-08-06 14:27:55,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 1874 transitions. [2021-08-06 14:27:55,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:55,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:55,442 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:55,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-08-06 14:27:55,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 14:27:55,649 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1911717885, now seen corresponding path program 63 times [2021-08-06 14:27:55,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:55,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952780789] [2021-08-06 14:27:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:55,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:55,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:55,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952780789] [2021-08-06 14:27:55,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952780789] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:55,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201168722] [2021-08-06 14:27:55,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:27:55,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:55,955 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:55,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 14:27:58,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:27:58,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:27:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:27:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:27:58,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:27:58,538 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:58,538 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 46 treesize of output 43 [2021-08-06 14:27:58,548 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:27:58,548 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 43 treesize of output 38 [2021-08-06 14:27:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:58,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201168722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:58,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:27:58,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:27:58,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315513763] [2021-08-06 14:27:58,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:27:58,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:27:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:27:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:27:58,775 INFO L87 Difference]: Start difference. First operand 614 states and 1874 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:27:59,081 INFO L93 Difference]: Finished difference Result 781 states and 2322 transitions. [2021-08-06 14:27:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:27:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:27:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:27:59,083 INFO L225 Difference]: With dead ends: 781 [2021-08-06 14:27:59,083 INFO L226 Difference]: Without dead ends: 750 [2021-08-06 14:27:59,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:27:59,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2021-08-06 14:27:59,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 599. [2021-08-06 14:27:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.031772575250836) internal successors, (1813), 598 states have internal predecessors, (1813), 0 states have call successors, (0), 0 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 14:27:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1813 transitions. [2021-08-06 14:27:59,090 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1813 transitions. Word has length 24 [2021-08-06 14:27:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:27:59,090 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1813 transitions. [2021-08-06 14:27:59,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:27:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1813 transitions. [2021-08-06 14:27:59,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:27:59,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:27:59,091 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:27:59,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 14:27:59,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 14:27:59,292 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:27:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:27:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1389590713, now seen corresponding path program 64 times [2021-08-06 14:27:59,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:27:59,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150310330] [2021-08-06 14:27:59,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:27:59,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:27:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:27:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:27:59,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:27:59,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150310330] [2021-08-06 14:27:59,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150310330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:27:59,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162959819] [2021-08-06 14:27:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:27:59,517 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:27:59,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:27:59,518 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:27:59,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 14:28:01,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:01,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:01,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:01,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:01,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:28:02,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2021-08-06 14:28:02,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:28:02,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:28:02,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:02,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162959819] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:02,275 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:02,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:28:02,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927811256] [2021-08-06 14:28:02,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:02,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:02,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:02,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:02,275 INFO L87 Difference]: Start difference. First operand 599 states and 1813 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:02,601 INFO L93 Difference]: Finished difference Result 709 states and 2126 transitions. [2021-08-06 14:28:02,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:28:02,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:28:02,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:02,603 INFO L225 Difference]: With dead ends: 709 [2021-08-06 14:28:02,603 INFO L226 Difference]: Without dead ends: 656 [2021-08-06 14:28:02,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 305.2ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:02,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2021-08-06 14:28:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 602. [2021-08-06 14:28:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.033277870216306) internal successors, (1823), 601 states have internal predecessors, (1823), 0 states have call successors, (0), 0 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 14:28:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1823 transitions. [2021-08-06 14:28:02,610 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1823 transitions. Word has length 24 [2021-08-06 14:28:02,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:02,610 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1823 transitions. [2021-08-06 14:28:02,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:02,610 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1823 transitions. [2021-08-06 14:28:02,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:02,611 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:02,611 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:02,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:02,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:02,811 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:02,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:02,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1081039869, now seen corresponding path program 65 times [2021-08-06 14:28:02,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:02,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732468591] [2021-08-06 14:28:02,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:02,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:03,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:03,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732468591] [2021-08-06 14:28:03,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732468591] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:03,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235372561] [2021-08-06 14:28:03,112 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:03,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:03,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:03,113 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:03,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 14:28:05,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:28:05,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:05,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:05,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:05,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:05,646 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 38 treesize of output 37 [2021-08-06 14:28:05,732 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:05,732 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 52 treesize of output 49 [2021-08-06 14:28:05,738 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:05,738 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 48 treesize of output 43 [2021-08-06 14:28:05,990 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:05,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235372561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:05,990 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:05,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:05,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293938372] [2021-08-06 14:28:05,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:05,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:05,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:05,991 INFO L87 Difference]: Start difference. First operand 602 states and 1823 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:06,553 INFO L93 Difference]: Finished difference Result 803 states and 2330 transitions. [2021-08-06 14:28:06,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:28:06,553 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:06,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:06,555 INFO L225 Difference]: With dead ends: 803 [2021-08-06 14:28:06,555 INFO L226 Difference]: Without dead ends: 741 [2021-08-06 14:28:06,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 554.8ms TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:28:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2021-08-06 14:28:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 617. [2021-08-06 14:28:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 3.0584415584415585) internal successors, (1884), 616 states have internal predecessors, (1884), 0 states have call successors, (0), 0 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 14:28:06,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 1884 transitions. [2021-08-06 14:28:06,562 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 1884 transitions. Word has length 24 [2021-08-06 14:28:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:06,562 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 1884 transitions. [2021-08-06 14:28:06,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:06,563 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 1884 transitions. [2021-08-06 14:28:06,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:06,564 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:06,564 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:06,588 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 14:28:06,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:06,764 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:06,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:06,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1653964633, now seen corresponding path program 66 times [2021-08-06 14:28:06,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:06,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902037444] [2021-08-06 14:28:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:06,765 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:07,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:07,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902037444] [2021-08-06 14:28:07,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902037444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:07,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481733136] [2021-08-06 14:28:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:07,097 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:07,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:07,097 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:07,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 14:28:09,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:28:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:09,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:09,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:09,682 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:09,683 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 38 treesize of output 37 [2021-08-06 14:28:09,777 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:09,777 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 52 treesize of output 49 [2021-08-06 14:28:09,785 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:09,785 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 48 treesize of output 43 [2021-08-06 14:28:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:10,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481733136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:10,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:10,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:28:10,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592092080] [2021-08-06 14:28:10,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:10,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:10,118 INFO L87 Difference]: Start difference. First operand 617 states and 1884 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:10,469 INFO L93 Difference]: Finished difference Result 744 states and 2206 transitions. [2021-08-06 14:28:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:28:10,469 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:28:10,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:10,470 INFO L225 Difference]: With dead ends: 744 [2021-08-06 14:28:10,470 INFO L226 Difference]: Without dead ends: 682 [2021-08-06 14:28:10,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:28:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-06 14:28:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 600. [2021-08-06 14:28:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.035058430717863) internal successors, (1818), 599 states have internal predecessors, (1818), 0 states have call successors, (0), 0 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 14:28:10,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1818 transitions. [2021-08-06 14:28:10,477 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1818 transitions. Word has length 24 [2021-08-06 14:28:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:10,477 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1818 transitions. [2021-08-06 14:28:10,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1818 transitions. [2021-08-06 14:28:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:10,478 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:10,478 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:10,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:10,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:10,681 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 715638361, now seen corresponding path program 67 times [2021-08-06 14:28:10,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:10,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606666397] [2021-08-06 14:28:10,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:10,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:10,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:10,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606666397] [2021-08-06 14:28:10,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606666397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:10,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183422268] [2021-08-06 14:28:10,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:10,883 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:10,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:10,883 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:10,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 14:28:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:13,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:13,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:28:13,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:28:13,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:13,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183422268] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:13,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:13,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:28:13,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460553092] [2021-08-06 14:28:13,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:28:13,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:13,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:28:13,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:28:13,838 INFO L87 Difference]: Start difference. First operand 600 states and 1818 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:14,103 INFO L93 Difference]: Finished difference Result 695 states and 2070 transitions. [2021-08-06 14:28:14,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:28:14,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:28:14,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:14,104 INFO L225 Difference]: With dead ends: 695 [2021-08-06 14:28:14,104 INFO L226 Difference]: Without dead ends: 664 [2021-08-06 14:28:14,104 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 304.3ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:14,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-08-06 14:28:14,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 620. [2021-08-06 14:28:14,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 619 states have (on average 3.0403877221324715) internal successors, (1882), 619 states have internal predecessors, (1882), 0 states have call successors, (0), 0 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 14:28:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 1882 transitions. [2021-08-06 14:28:14,111 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 1882 transitions. Word has length 24 [2021-08-06 14:28:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:14,112 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 1882 transitions. [2021-08-06 14:28:14,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 1882 transitions. [2021-08-06 14:28:14,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:14,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:14,113 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:14,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:14,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:14,317 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:14,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:14,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1879571535, now seen corresponding path program 68 times [2021-08-06 14:28:14,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:14,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690075515] [2021-08-06 14:28:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:14,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:14,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:14,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:14,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690075515] [2021-08-06 14:28:14,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690075515] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:14,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866466626] [2021-08-06 14:28:14,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:14,564 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:14,565 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:14,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 14:28:17,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:17,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:17,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:17,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:17,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:28:17,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:28:17,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:28:17,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:28:17,525 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:17,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866466626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:17,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:17,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:28:17,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514347703] [2021-08-06 14:28:17,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:17,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:17,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:17,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:17,526 INFO L87 Difference]: Start difference. First operand 620 states and 1882 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:17,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:17,955 INFO L93 Difference]: Finished difference Result 913 states and 2620 transitions. [2021-08-06 14:28:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:28:17,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:28:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:17,957 INFO L225 Difference]: With dead ends: 913 [2021-08-06 14:28:17,957 INFO L226 Difference]: Without dead ends: 820 [2021-08-06 14:28:17,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 400.2ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:28:17,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-08-06 14:28:17,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 626. [2021-08-06 14:28:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.0512) internal successors, (1907), 625 states have internal predecessors, (1907), 0 states have call successors, (0), 0 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 14:28:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1907 transitions. [2021-08-06 14:28:17,965 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1907 transitions. Word has length 24 [2021-08-06 14:28:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:17,965 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1907 transitions. [2021-08-06 14:28:17,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:17,965 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1907 transitions. [2021-08-06 14:28:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:17,966 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:17,966 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:17,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 14:28:18,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-08-06 14:28:18,167 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash -520566187, now seen corresponding path program 69 times [2021-08-06 14:28:18,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:18,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442272491] [2021-08-06 14:28:18,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:18,167 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:18,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:18,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:18,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442272491] [2021-08-06 14:28:18,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442272491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:18,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382685926] [2021-08-06 14:28:18,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:18,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:18,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:18,412 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:18,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 14:28:20,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:28:20,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:21,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:28:21,312 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:21,312 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 33 treesize of output 30 [2021-08-06 14:28:21,321 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:21,321 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 34 treesize of output 29 [2021-08-06 14:28:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:21,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382685926] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:21,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:21,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:28:21,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430397609] [2021-08-06 14:28:21,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:21,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:21,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:21,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:21,518 INFO L87 Difference]: Start difference. First operand 626 states and 1907 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:21,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:21,822 INFO L93 Difference]: Finished difference Result 788 states and 2306 transitions. [2021-08-06 14:28:21,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:28:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:28:21,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:21,824 INFO L225 Difference]: With dead ends: 788 [2021-08-06 14:28:21,824 INFO L226 Difference]: Without dead ends: 683 [2021-08-06 14:28:21,824 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 293.2ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:28:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-08-06 14:28:21,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 633. [2021-08-06 14:28:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 3.050632911392405) internal successors, (1928), 632 states have internal predecessors, (1928), 0 states have call successors, (0), 0 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 14:28:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1928 transitions. [2021-08-06 14:28:21,831 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1928 transitions. Word has length 24 [2021-08-06 14:28:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:21,831 INFO L470 AbstractCegarLoop]: Abstraction has 633 states and 1928 transitions. [2021-08-06 14:28:21,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1928 transitions. [2021-08-06 14:28:21,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:21,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:21,833 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:21,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:22,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:22,039 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 804957977, now seen corresponding path program 70 times [2021-08-06 14:28:22,040 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:22,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429109150] [2021-08-06 14:28:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:22,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:22,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429109150] [2021-08-06 14:28:22,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429109150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:22,313 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346090440] [2021-08-06 14:28:22,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:28:22,313 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:22,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:22,314 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:22,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 14:28:24,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:24,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:24,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:24,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:24,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:28:25,358 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:25,359 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 30 treesize of output 29 [2021-08-06 14:28:25,364 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:25,364 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 24 treesize of output 23 [2021-08-06 14:28:25,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:25,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346090440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:25,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:25,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:28:25,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758937211] [2021-08-06 14:28:25,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:28:25,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:25,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:28:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:28:25,516 INFO L87 Difference]: Start difference. First operand 633 states and 1928 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:25,796 INFO L93 Difference]: Finished difference Result 834 states and 2490 transitions. [2021-08-06 14:28:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:28:25,796 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:28:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:25,798 INFO L225 Difference]: With dead ends: 834 [2021-08-06 14:28:25,798 INFO L226 Difference]: Without dead ends: 776 [2021-08-06 14:28:25,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 268.9ms TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2021-08-06 14:28:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 626. [2021-08-06 14:28:25,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.0512) internal successors, (1907), 625 states have internal predecessors, (1907), 0 states have call successors, (0), 0 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 14:28:25,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1907 transitions. [2021-08-06 14:28:25,806 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1907 transitions. Word has length 24 [2021-08-06 14:28:25,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:25,806 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1907 transitions. [2021-08-06 14:28:25,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 16 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1907 transitions. [2021-08-06 14:28:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:25,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:25,807 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:25,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 14:28:26,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:26,007 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:26,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2131722677, now seen corresponding path program 71 times [2021-08-06 14:28:26,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:26,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385802058] [2021-08-06 14:28:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:26,008 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:26,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385802058] [2021-08-06 14:28:26,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385802058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:26,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864906265] [2021-08-06 14:28:26,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:26,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:26,280 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:26,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 14:28:28,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:28:28,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:28,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:28,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:29,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:28:29,135 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:29,136 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 46 treesize of output 43 [2021-08-06 14:28:29,141 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:29,142 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 43 treesize of output 38 [2021-08-06 14:28:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:29,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864906265] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:29,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:29,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:29,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728581166] [2021-08-06 14:28:29,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:29,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:29,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:29,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:29,387 INFO L87 Difference]: Start difference. First operand 626 states and 1907 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:29,944 INFO L93 Difference]: Finished difference Result 1017 states and 2946 transitions. [2021-08-06 14:28:29,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:28:29,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:29,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:29,946 INFO L225 Difference]: With dead ends: 1017 [2021-08-06 14:28:29,946 INFO L226 Difference]: Without dead ends: 951 [2021-08-06 14:28:29,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 489.0ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:28:29,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 951 states. [2021-08-06 14:28:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 951 to 636. [2021-08-06 14:28:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.0708661417322833) internal successors, (1950), 635 states have internal predecessors, (1950), 0 states have call successors, (0), 0 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 14:28:29,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1950 transitions. [2021-08-06 14:28:29,954 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1950 transitions. Word has length 24 [2021-08-06 14:28:29,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:29,955 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1950 transitions. [2021-08-06 14:28:29,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:29,955 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1950 transitions. [2021-08-06 14:28:29,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:29,956 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:29,956 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:29,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:30,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:30,169 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:30,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:30,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1590319855, now seen corresponding path program 72 times [2021-08-06 14:28:30,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:30,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577803662] [2021-08-06 14:28:30,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:30,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:30,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:30,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:30,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577803662] [2021-08-06 14:28:30,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577803662] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:30,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380952777] [2021-08-06 14:28:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:30,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:30,447 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:30,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 14:28:33,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:28:33,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:33,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:33,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:33,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2021-08-06 14:28:33,282 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:33,283 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 46 treesize of output 43 [2021-08-06 14:28:33,288 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:33,288 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 43 treesize of output 38 [2021-08-06 14:28:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:33,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380952777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:33,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:33,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:33,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820988980] [2021-08-06 14:28:33,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:33,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:33,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:33,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:33,513 INFO L87 Difference]: Start difference. First operand 636 states and 1950 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:33,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:33,910 INFO L93 Difference]: Finished difference Result 1034 states and 3025 transitions. [2021-08-06 14:28:33,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:28:33,910 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:33,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:33,911 INFO L225 Difference]: With dead ends: 1034 [2021-08-06 14:28:33,911 INFO L226 Difference]: Without dead ends: 976 [2021-08-06 14:28:33,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:28:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2021-08-06 14:28:33,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 638. [2021-08-06 14:28:33,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 638 states, 637 states have (on average 3.086342229199372) internal successors, (1966), 637 states have internal predecessors, (1966), 0 states have call successors, (0), 0 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 14:28:33,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 638 states to 638 states and 1966 transitions. [2021-08-06 14:28:33,920 INFO L78 Accepts]: Start accepts. Automaton has 638 states and 1966 transitions. Word has length 24 [2021-08-06 14:28:33,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:33,921 INFO L470 AbstractCegarLoop]: Abstraction has 638 states and 1966 transitions. [2021-08-06 14:28:33,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 638 states and 1966 transitions. [2021-08-06 14:28:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:33,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:33,922 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:33,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:34,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 14:28:34,122 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:34,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:34,122 INFO L82 PathProgramCache]: Analyzing trace with hash -115291869, now seen corresponding path program 73 times [2021-08-06 14:28:34,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:34,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283771386] [2021-08-06 14:28:34,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:34,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:34,323 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:34,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283771386] [2021-08-06 14:28:34,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283771386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:34,323 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432160808] [2021-08-06 14:28:34,323 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:34,323 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:34,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:34,324 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:34,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 14:28:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:37,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:37,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-08-06 14:28:37,334 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:37,334 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 33 treesize of output 30 [2021-08-06 14:28:37,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:37,340 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 34 treesize of output 29 [2021-08-06 14:28:37,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:37,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432160808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:37,538 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:37,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:28:37,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980064238] [2021-08-06 14:28:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:28:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:28:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:28:37,539 INFO L87 Difference]: Start difference. First operand 638 states and 1966 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:37,712 INFO L93 Difference]: Finished difference Result 729 states and 2171 transitions. [2021-08-06 14:28:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:28:37,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:28:37,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:37,713 INFO L225 Difference]: With dead ends: 729 [2021-08-06 14:28:37,713 INFO L226 Difference]: Without dead ends: 646 [2021-08-06 14:28:37,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 233.0ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-08-06 14:28:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 636. [2021-08-06 14:28:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 635 states have (on average 3.0803149606299214) internal successors, (1956), 635 states have internal predecessors, (1956), 0 states have call successors, (0), 0 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 14:28:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 1956 transitions. [2021-08-06 14:28:37,720 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 1956 transitions. Word has length 24 [2021-08-06 14:28:37,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:37,720 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 1956 transitions. [2021-08-06 14:28:37,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:28:37,720 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 1956 transitions. [2021-08-06 14:28:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:37,721 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:37,721 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:37,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:37,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:37,923 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:37,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:37,924 INFO L82 PathProgramCache]: Analyzing trace with hash -798877785, now seen corresponding path program 74 times [2021-08-06 14:28:37,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:37,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452940421] [2021-08-06 14:28:37,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:37,924 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:37,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:38,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:38,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452940421] [2021-08-06 14:28:38,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452940421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:38,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717307513] [2021-08-06 14:28:38,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:28:38,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:38,156 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:38,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 14:28:40,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:28:40,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:40,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:40,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:41,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-08-06 14:28:41,060 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:41,060 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 30 treesize of output 29 [2021-08-06 14:28:41,065 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:41,066 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 24 treesize of output 23 [2021-08-06 14:28:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:41,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717307513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:41,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:41,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:41,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201856220] [2021-08-06 14:28:41,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:41,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:41,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:41,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:41,272 INFO L87 Difference]: Start difference. First operand 636 states and 1956 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:41,539 INFO L93 Difference]: Finished difference Result 746 states and 2283 transitions. [2021-08-06 14:28:41,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:28:41,539 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:41,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:41,540 INFO L225 Difference]: With dead ends: 746 [2021-08-06 14:28:41,540 INFO L226 Difference]: Without dead ends: 715 [2021-08-06 14:28:41,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 265.9ms TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:28:41,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-06 14:28:41,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 625. [2021-08-06 14:28:41,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 3.0673076923076925) internal successors, (1914), 624 states have internal predecessors, (1914), 0 states have call successors, (0), 0 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 14:28:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 1914 transitions. [2021-08-06 14:28:41,547 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 1914 transitions. Word has length 24 [2021-08-06 14:28:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:41,548 INFO L470 AbstractCegarLoop]: Abstraction has 625 states and 1914 transitions. [2021-08-06 14:28:41,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 1914 transitions. [2021-08-06 14:28:41,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:41,549 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:41,549 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:41,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:41,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:41,774 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash -415402801, now seen corresponding path program 75 times [2021-08-06 14:28:41,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:41,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870053933] [2021-08-06 14:28:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:41,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:42,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:42,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870053933] [2021-08-06 14:28:42,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870053933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:42,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396614905] [2021-08-06 14:28:42,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:28:42,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:42,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:42,016 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:42,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 14:28:44,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:28:44,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:44,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:28:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:44,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:28:44,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:28:45,070 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:45,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396614905] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:45,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:45,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:28:45,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312606157] [2021-08-06 14:28:45,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:28:45,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:28:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:28:45,071 INFO L87 Difference]: Start difference. First operand 625 states and 1914 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:45,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:45,578 INFO L93 Difference]: Finished difference Result 961 states and 2843 transitions. [2021-08-06 14:28:45,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:28:45,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:28:45,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:45,579 INFO L225 Difference]: With dead ends: 961 [2021-08-06 14:28:45,579 INFO L226 Difference]: Without dead ends: 853 [2021-08-06 14:28:45,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:28:45,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-08-06 14:28:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 646. [2021-08-06 14:28:45,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 645 states have (on average 3.108527131782946) internal successors, (2005), 645 states have internal predecessors, (2005), 0 states have call successors, (0), 0 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 14:28:45,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 2005 transitions. [2021-08-06 14:28:45,588 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 2005 transitions. Word has length 24 [2021-08-06 14:28:45,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:45,588 INFO L470 AbstractCegarLoop]: Abstraction has 646 states and 2005 transitions. [2021-08-06 14:28:45,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 2005 transitions. [2021-08-06 14:28:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:45,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:45,589 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:45,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:45,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:45,805 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash -997163581, now seen corresponding path program 76 times [2021-08-06 14:28:45,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:45,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434627738] [2021-08-06 14:28:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:45,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:46,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:46,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:46,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434627738] [2021-08-06 14:28:46,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434627738] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:46,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664035153] [2021-08-06 14:28:46,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:28:46,082 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:46,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:46,082 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:46,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 14:28:48,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:28:48,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:48,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:48,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:48,992 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:48,992 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 37 treesize of output 34 [2021-08-06 14:28:49,115 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:49,115 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 49 treesize of output 46 [2021-08-06 14:28:49,122 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:49,122 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 41 treesize of output 36 [2021-08-06 14:28:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:49,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664035153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:49,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:49,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:49,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212188256] [2021-08-06 14:28:49,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:49,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:49,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:49,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:49,451 INFO L87 Difference]: Start difference. First operand 646 states and 2005 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:49,930 INFO L93 Difference]: Finished difference Result 1034 states and 3082 transitions. [2021-08-06 14:28:49,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:28:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:49,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:49,932 INFO L225 Difference]: With dead ends: 1034 [2021-08-06 14:28:49,932 INFO L226 Difference]: Without dead ends: 954 [2021-08-06 14:28:49,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:28:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2021-08-06 14:28:49,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 662. [2021-08-06 14:28:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 661 states have (on average 3.124054462934947) internal successors, (2065), 661 states have internal predecessors, (2065), 0 states have call successors, (0), 0 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 14:28:49,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 2065 transitions. [2021-08-06 14:28:49,941 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 2065 transitions. Word has length 24 [2021-08-06 14:28:49,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:49,941 INFO L470 AbstractCegarLoop]: Abstraction has 662 states and 2065 transitions. [2021-08-06 14:28:49,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:49,942 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 2065 transitions. [2021-08-06 14:28:49,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:49,943 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:49,943 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:49,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-06 14:28:50,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:50,143 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1275955627, now seen corresponding path program 77 times [2021-08-06 14:28:50,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:50,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071768496] [2021-08-06 14:28:50,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:50,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:50,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:50,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071768496] [2021-08-06 14:28:50,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071768496] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:50,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618784562] [2021-08-06 14:28:50,421 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:28:50,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:50,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:50,421 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:50,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 14:28:53,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:28:53,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:53,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 14:28:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:53,390 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:53,390 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 37 treesize of output 34 [2021-08-06 14:28:53,525 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:53,525 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 44 treesize of output 41 [2021-08-06 14:28:53,532 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:53,533 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 41 treesize of output 36 [2021-08-06 14:28:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:53,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618784562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:53,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:53,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:53,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351704638] [2021-08-06 14:28:53,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:53,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:53,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:53,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:53,862 INFO L87 Difference]: Start difference. First operand 662 states and 2065 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:54,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:54,495 INFO L93 Difference]: Finished difference Result 1073 states and 3149 transitions. [2021-08-06 14:28:54,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:28:54,495 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:54,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:54,497 INFO L225 Difference]: With dead ends: 1073 [2021-08-06 14:28:54,497 INFO L226 Difference]: Without dead ends: 996 [2021-08-06 14:28:54,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 618.8ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:28:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-08-06 14:28:54,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 668. [2021-08-06 14:28:54,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 668 states, 667 states have (on average 3.133433283358321) internal successors, (2090), 667 states have internal predecessors, (2090), 0 states have call successors, (0), 0 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 14:28:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 2090 transitions. [2021-08-06 14:28:54,505 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 2090 transitions. Word has length 24 [2021-08-06 14:28:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:54,506 INFO L470 AbstractCegarLoop]: Abstraction has 668 states and 2090 transitions. [2021-08-06 14:28:54,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:54,506 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 2090 transitions. [2021-08-06 14:28:54,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:54,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:54,507 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:54,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:54,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:54,707 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:54,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:54,707 INFO L82 PathProgramCache]: Analyzing trace with hash -587183655, now seen corresponding path program 78 times [2021-08-06 14:28:54,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:54,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413798807] [2021-08-06 14:28:54,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:54,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:54,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:54,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:54,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413798807] [2021-08-06 14:28:54,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413798807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:54,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773993692] [2021-08-06 14:28:54,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:28:54,976 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:54,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:54,977 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:54,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 14:28:57,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:28:57,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:28:57,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:28:57,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:28:57,963 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:57,963 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 37 treesize of output 34 [2021-08-06 14:28:58,130 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:58,131 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 33 treesize of output 32 [2021-08-06 14:28:58,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:28:58,137 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 30 treesize of output 29 [2021-08-06 14:28:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:58,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773993692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:58,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:28:58,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:28:58,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604198910] [2021-08-06 14:28:58,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:28:58,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:28:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:28:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:28:58,316 INFO L87 Difference]: Start difference. First operand 668 states and 2090 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:58,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:28:58,948 INFO L93 Difference]: Finished difference Result 1084 states and 3183 transitions. [2021-08-06 14:28:58,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:28:58,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:28:58,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:28:58,950 INFO L225 Difference]: With dead ends: 1084 [2021-08-06 14:28:58,950 INFO L226 Difference]: Without dead ends: 937 [2021-08-06 14:28:58,950 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 542.5ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:28:58,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 937 states. [2021-08-06 14:28:58,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 937 to 664. [2021-08-06 14:28:58,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 3.1161387631975868) internal successors, (2066), 663 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:28:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 2066 transitions. [2021-08-06 14:28:58,958 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 2066 transitions. Word has length 24 [2021-08-06 14:28:58,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:28:58,958 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 2066 transitions. [2021-08-06 14:28:58,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:28:58,958 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 2066 transitions. [2021-08-06 14:28:58,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:28:58,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:28:58,959 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:28:58,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 14:28:59,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:59,160 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:28:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:28:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash -577997105, now seen corresponding path program 79 times [2021-08-06 14:28:59,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:28:59,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437327324] [2021-08-06 14:28:59,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:28:59,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:28:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:28:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:28:59,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:28:59,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437327324] [2021-08-06 14:28:59,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437327324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:28:59,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480981042] [2021-08-06 14:28:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:28:59,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:28:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:28:59,430 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:28:59,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 14:29:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:02,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:02,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:02,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:02,407 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 30 treesize of output 29 [2021-08-06 14:29:02,627 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:02,628 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 45 treesize of output 42 [2021-08-06 14:29:02,633 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:02,634 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 38 treesize of output 33 [2021-08-06 14:29:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:02,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480981042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:02,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:02,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:29:02,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248448918] [2021-08-06 14:29:02,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:02,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:02,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:02,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:02,908 INFO L87 Difference]: Start difference. First operand 664 states and 2066 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:03,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:03,108 INFO L93 Difference]: Finished difference Result 802 states and 2449 transitions. [2021-08-06 14:29:03,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:03,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:03,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:03,110 INFO L225 Difference]: With dead ends: 802 [2021-08-06 14:29:03,110 INFO L226 Difference]: Without dead ends: 732 [2021-08-06 14:29:03,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-08-06 14:29:03,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 670. [2021-08-06 14:29:03,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.116591928251121) internal successors, (2085), 669 states have internal predecessors, (2085), 0 states have call successors, (0), 0 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 14:29:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2085 transitions. [2021-08-06 14:29:03,117 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2085 transitions. Word has length 24 [2021-08-06 14:29:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:03,117 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2085 transitions. [2021-08-06 14:29:03,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:03,118 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2085 transitions. [2021-08-06 14:29:03,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:03,119 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:03,119 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:03,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:03,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-08-06 14:29:03,319 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:03,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:03,320 INFO L82 PathProgramCache]: Analyzing trace with hash -269446261, now seen corresponding path program 80 times [2021-08-06 14:29:03,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:03,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661232628] [2021-08-06 14:29:03,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:03,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:03,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:03,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:03,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661232628] [2021-08-06 14:29:03,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661232628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:03,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413068617] [2021-08-06 14:29:03,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:03,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:03,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:03,595 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:03,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 14:29:06,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:06,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:06,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:06,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:06,675 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:06,675 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 30 treesize of output 29 [2021-08-06 14:29:06,776 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:06,776 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 50 treesize of output 47 [2021-08-06 14:29:06,783 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:06,783 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 41 treesize of output 36 [2021-08-06 14:29:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:07,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413068617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:07,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:07,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:29:07,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164262317] [2021-08-06 14:29:07,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:07,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:07,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:07,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:07,174 INFO L87 Difference]: Start difference. First operand 670 states and 2085 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:07,682 INFO L93 Difference]: Finished difference Result 907 states and 2740 transitions. [2021-08-06 14:29:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:07,684 INFO L225 Difference]: With dead ends: 907 [2021-08-06 14:29:07,684 INFO L226 Difference]: Without dead ends: 827 [2021-08-06 14:29:07,684 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 485.0ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:29:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2021-08-06 14:29:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 673. [2021-08-06 14:29:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.1175595238095237) internal successors, (2095), 672 states have internal predecessors, (2095), 0 states have call successors, (0), 0 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 14:29:07,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2095 transitions. [2021-08-06 14:29:07,692 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2095 transitions. Word has length 24 [2021-08-06 14:29:07,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:07,692 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 2095 transitions. [2021-08-06 14:29:07,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:07,693 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2095 transitions. [2021-08-06 14:29:07,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:07,694 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:07,694 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:07,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-06 14:29:07,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:07,894 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2003672947, now seen corresponding path program 81 times [2021-08-06 14:29:07,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:07,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573230041] [2021-08-06 14:29:07,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:07,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:08,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573230041] [2021-08-06 14:29:08,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573230041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:08,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965540615] [2021-08-06 14:29:08,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:29:08,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:08,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:08,150 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:08,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 14:29:11,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:29:11,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:11,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:11,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:11,264 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:11,265 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 30 treesize of output 29 [2021-08-06 14:29:11,375 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:11,375 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 50 treesize of output 47 [2021-08-06 14:29:11,383 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:11,384 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 41 treesize of output 36 [2021-08-06 14:29:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:11,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965540615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:11,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:11,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:11,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268627052] [2021-08-06 14:29:11,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:11,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:11,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:11,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:11,661 INFO L87 Difference]: Start difference. First operand 673 states and 2095 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:12,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:12,142 INFO L93 Difference]: Finished difference Result 974 states and 2869 transitions. [2021-08-06 14:29:12,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:29:12,143 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:29:12,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:12,144 INFO L225 Difference]: With dead ends: 974 [2021-08-06 14:29:12,144 INFO L226 Difference]: Without dead ends: 881 [2021-08-06 14:29:12,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:29:12,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2021-08-06 14:29:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 682. [2021-08-06 14:29:12,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.13215859030837) internal successors, (2133), 681 states have internal predecessors, (2133), 0 states have call successors, (0), 0 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 14:29:12,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2133 transitions. [2021-08-06 14:29:12,152 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2133 transitions. Word has length 24 [2021-08-06 14:29:12,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:12,152 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2133 transitions. [2021-08-06 14:29:12,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:12,152 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2133 transitions. [2021-08-06 14:29:12,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:12,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:12,153 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:12,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:12,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:12,354 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:12,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:12,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1773703701, now seen corresponding path program 82 times [2021-08-06 14:29:12,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:12,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940943747] [2021-08-06 14:29:12,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:12,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:12,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:12,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940943747] [2021-08-06 14:29:12,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940943747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:12,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501917836] [2021-08-06 14:29:12,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:12,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:12,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:12,718 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:12,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 14:29:15,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:15,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:15,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:15,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:15,850 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:15,851 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 30 treesize of output 29 [2021-08-06 14:29:15,979 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:15,979 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 60 treesize of output 55 [2021-08-06 14:29:15,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:15,985 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 56 treesize of output 47 [2021-08-06 14:29:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:16,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501917836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:16,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:16,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:16,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033676304] [2021-08-06 14:29:16,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:16,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:16,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:16,166 INFO L87 Difference]: Start difference. First operand 682 states and 2133 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:16,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:16,546 INFO L93 Difference]: Finished difference Result 738 states and 2272 transitions. [2021-08-06 14:29:16,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:16,546 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:29:16,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:16,548 INFO L225 Difference]: With dead ends: 738 [2021-08-06 14:29:16,548 INFO L226 Difference]: Without dead ends: 707 [2021-08-06 14:29:16,548 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 409.4ms TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:29:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-08-06 14:29:16,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 682. [2021-08-06 14:29:16,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.13215859030837) internal successors, (2133), 681 states have internal predecessors, (2133), 0 states have call successors, (0), 0 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 14:29:16,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2133 transitions. [2021-08-06 14:29:16,555 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2133 transitions. Word has length 24 [2021-08-06 14:29:16,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:16,555 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2133 transitions. [2021-08-06 14:29:16,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:16,555 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2133 transitions. [2021-08-06 14:29:16,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:16,556 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:16,556 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:16,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 14:29:16,757 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:16,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:16,757 INFO L82 PathProgramCache]: Analyzing trace with hash 135828057, now seen corresponding path program 83 times [2021-08-06 14:29:16,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:16,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856385315] [2021-08-06 14:29:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:16,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:16,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:17,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:17,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856385315] [2021-08-06 14:29:17,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856385315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:17,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044514661] [2021-08-06 14:29:17,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:17,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:17,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:17,079 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:17,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 14:29:20,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 14:29:20,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:20,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:20,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:20,213 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:20,213 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 37 treesize of output 34 [2021-08-06 14:29:20,297 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:20,297 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 52 treesize of output 49 [2021-08-06 14:29:20,303 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:20,303 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 49 treesize of output 44 [2021-08-06 14:29:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:20,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044514661] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:20,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:20,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:20,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507731325] [2021-08-06 14:29:20,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:20,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:20,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:20,596 INFO L87 Difference]: Start difference. First operand 682 states and 2133 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:21,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:21,234 INFO L93 Difference]: Finished difference Result 989 states and 3014 transitions. [2021-08-06 14:29:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:21,234 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:29:21,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:21,236 INFO L225 Difference]: With dead ends: 989 [2021-08-06 14:29:21,236 INFO L226 Difference]: Without dead ends: 923 [2021-08-06 14:29:21,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 658.4ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:29:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 923 states. [2021-08-06 14:29:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 923 to 694. [2021-08-06 14:29:21,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 693 states have (on average 3.1529581529581527) internal successors, (2185), 693 states have internal predecessors, (2185), 0 states have call successors, (0), 0 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 14:29:21,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 2185 transitions. [2021-08-06 14:29:21,245 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 2185 transitions. Word has length 24 [2021-08-06 14:29:21,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:21,245 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 2185 transitions. [2021-08-06 14:29:21,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:21,245 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 2185 transitions. [2021-08-06 14:29:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:21,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:21,246 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:21,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:21,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:21,448 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:21,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:21,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1886020031, now seen corresponding path program 84 times [2021-08-06 14:29:21,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:21,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285566890] [2021-08-06 14:29:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:21,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:21,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:21,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:21,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285566890] [2021-08-06 14:29:21,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285566890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:21,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680517816] [2021-08-06 14:29:21,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:21,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:21,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:21,822 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:21,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 14:29:24,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:29:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:24,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:25,073 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:25,073 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 37 treesize of output 34 [2021-08-06 14:29:25,167 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:25,167 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 52 treesize of output 49 [2021-08-06 14:29:25,173 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:25,173 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 41 treesize of output 36 [2021-08-06 14:29:25,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:25,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680517816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:25,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:25,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:25,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697154593] [2021-08-06 14:29:25,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:25,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:25,398 INFO L87 Difference]: Start difference. First operand 694 states and 2185 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:25,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:25,951 INFO L93 Difference]: Finished difference Result 1075 states and 3208 transitions. [2021-08-06 14:29:25,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:29:25,951 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:29:25,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:25,953 INFO L225 Difference]: With dead ends: 1075 [2021-08-06 14:29:25,953 INFO L226 Difference]: Without dead ends: 1013 [2021-08-06 14:29:25,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:29:25,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2021-08-06 14:29:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 701. [2021-08-06 14:29:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 701 states, 700 states have (on average 3.157142857142857) internal successors, (2210), 700 states have internal predecessors, (2210), 0 states have call successors, (0), 0 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 14:29:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 2210 transitions. [2021-08-06 14:29:25,962 INFO L78 Accepts]: Start accepts. Automaton has 701 states and 2210 transitions. Word has length 24 [2021-08-06 14:29:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:25,962 INFO L470 AbstractCegarLoop]: Abstraction has 701 states and 2210 transitions. [2021-08-06 14:29:25,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 701 states and 2210 transitions. [2021-08-06 14:29:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:25,963 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:25,963 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:25,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:26,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:26,164 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:26,164 INFO L82 PathProgramCache]: Analyzing trace with hash 545807983, now seen corresponding path program 85 times [2021-08-06 14:29:26,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:26,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046530933] [2021-08-06 14:29:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:26,164 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:26,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:26,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046530933] [2021-08-06 14:29:26,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046530933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:26,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963183034] [2021-08-06 14:29:26,524 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:29:26,525 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:26,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:26,526 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:26,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 14:29:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:29,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:29,728 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 37 treesize of output 34 [2021-08-06 14:29:29,881 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:29,881 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 36 treesize of output 35 [2021-08-06 14:29:29,887 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:29,887 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 30 treesize of output 29 [2021-08-06 14:29:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:30,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963183034] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:30,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:30,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:29:30,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837571126] [2021-08-06 14:29:30,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:29:30,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:30,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:29:30,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:30,094 INFO L87 Difference]: Start difference. First operand 701 states and 2210 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:30,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:30,299 INFO L93 Difference]: Finished difference Result 855 states and 2619 transitions. [2021-08-06 14:29:30,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:30,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:29:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:30,300 INFO L225 Difference]: With dead ends: 855 [2021-08-06 14:29:30,300 INFO L226 Difference]: Without dead ends: 793 [2021-08-06 14:29:30,301 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-08-06 14:29:30,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 682. [2021-08-06 14:29:30,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 681 states have (on average 3.13215859030837) internal successors, (2133), 681 states have internal predecessors, (2133), 0 states have call successors, (0), 0 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 14:29:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 2133 transitions. [2021-08-06 14:29:30,308 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 2133 transitions. Word has length 24 [2021-08-06 14:29:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:30,309 INFO L470 AbstractCegarLoop]: Abstraction has 682 states and 2133 transitions. [2021-08-06 14:29:30,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:29:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 2133 transitions. [2021-08-06 14:29:30,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:30,309 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:30,310 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:30,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:30,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 14:29:30,510 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:30,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1791978817, now seen corresponding path program 86 times [2021-08-06 14:29:30,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:30,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381252009] [2021-08-06 14:29:30,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:30,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:30,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:30,750 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:30,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381252009] [2021-08-06 14:29:30,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381252009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:30,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807997184] [2021-08-06 14:29:30,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:30,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:30,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:30,751 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:30,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 14:29:33,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:29:33,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:34,137 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:34,137 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 38 treesize of output 35 [2021-08-06 14:29:34,236 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:34,237 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 50 treesize of output 47 [2021-08-06 14:29:34,244 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:29:34,244 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 41 treesize of output 36 [2021-08-06 14:29:34,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:34,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807997184] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:34,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:34,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:29:34,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85395701] [2021-08-06 14:29:34,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:29:34,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:34,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:29:34,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:29:34,507 INFO L87 Difference]: Start difference. First operand 682 states and 2133 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:34,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:34,783 INFO L93 Difference]: Finished difference Result 732 states and 2242 transitions. [2021-08-06 14:29:34,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:29:34,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:34,784 INFO L225 Difference]: With dead ends: 732 [2021-08-06 14:29:34,784 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 14:29:34,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 292.5ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:29:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 14:29:34,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 680. [2021-08-06 14:29:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.134020618556701) internal successors, (2128), 679 states have internal predecessors, (2128), 0 states have call successors, (0), 0 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 14:29:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2128 transitions. [2021-08-06 14:29:34,791 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2128 transitions. Word has length 24 [2021-08-06 14:29:34,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:34,792 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2128 transitions. [2021-08-06 14:29:34,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:34,792 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2128 transitions. [2021-08-06 14:29:34,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:34,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:34,793 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:34,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 14:29:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 14:29:34,993 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:34,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1875725259, now seen corresponding path program 87 times [2021-08-06 14:29:34,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:34,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31457985] [2021-08-06 14:29:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:34,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:35,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:35,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31457985] [2021-08-06 14:29:35,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31457985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:35,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623334037] [2021-08-06 14:29:35,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:29:35,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:35,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:35,223 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:35,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 14:29:38,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:29:38,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:38,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:38,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:38,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:29:38,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:29:38,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:29:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:38,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623334037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:38,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:38,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:29:38,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916249127] [2021-08-06 14:29:38,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:38,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:38,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:38,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:38,810 INFO L87 Difference]: Start difference. First operand 680 states and 2128 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:39,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:39,495 INFO L93 Difference]: Finished difference Result 1097 states and 3210 transitions. [2021-08-06 14:29:39,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:39,496 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:39,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:39,497 INFO L225 Difference]: With dead ends: 1097 [2021-08-06 14:29:39,497 INFO L226 Difference]: Without dead ends: 997 [2021-08-06 14:29:39,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 669.6ms TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:29:39,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-08-06 14:29:39,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 706. [2021-08-06 14:29:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706 states, 705 states have (on average 3.1304964539007094) internal successors, (2207), 705 states have internal predecessors, (2207), 0 states have call successors, (0), 0 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 14:29:39,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 2207 transitions. [2021-08-06 14:29:39,506 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 2207 transitions. Word has length 24 [2021-08-06 14:29:39,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:39,506 INFO L470 AbstractCegarLoop]: Abstraction has 706 states and 2207 transitions. [2021-08-06 14:29:39,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:39,506 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 2207 transitions. [2021-08-06 14:29:39,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:39,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:39,507 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 14:29:39,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:39,707 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:39,708 INFO L82 PathProgramCache]: Analyzing trace with hash -226534959, now seen corresponding path program 88 times [2021-08-06 14:29:39,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:39,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259840829] [2021-08-06 14:29:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:39,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:39,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:39,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:39,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259840829] [2021-08-06 14:29:39,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259840829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:39,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525272292] [2021-08-06 14:29:39,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:29:39,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:39,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:39,923 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:39,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 14:29:43,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:29:43,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:43,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:43,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:43,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:29:43,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:29:43,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:29:43,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:43,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525272292] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:43,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:43,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:29:43,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685821586] [2021-08-06 14:29:43,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:43,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:43,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:43,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:43,614 INFO L87 Difference]: Start difference. First operand 706 states and 2207 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:44,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:44,310 INFO L93 Difference]: Finished difference Result 1017 states and 3021 transitions. [2021-08-06 14:29:44,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:44,311 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:44,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:44,312 INFO L225 Difference]: With dead ends: 1017 [2021-08-06 14:29:44,312 INFO L226 Difference]: Without dead ends: 931 [2021-08-06 14:29:44,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 748.1ms TimeCoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:29:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-06 14:29:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 714. [2021-08-06 14:29:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.126227208976157) internal successors, (2229), 713 states have internal predecessors, (2229), 0 states have call successors, (0), 0 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 14:29:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2229 transitions. [2021-08-06 14:29:44,321 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2229 transitions. Word has length 24 [2021-08-06 14:29:44,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:44,321 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2229 transitions. [2021-08-06 14:29:44,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:44,321 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2229 transitions. [2021-08-06 14:29:44,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:44,322 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:44,322 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:44,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 14:29:44,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 14:29:44,523 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:44,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:44,523 INFO L82 PathProgramCache]: Analyzing trace with hash 937398215, now seen corresponding path program 89 times [2021-08-06 14:29:44,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:44,523 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499358006] [2021-08-06 14:29:44,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:44,524 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:44,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:44,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499358006] [2021-08-06 14:29:44,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499358006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:44,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852781851] [2021-08-06 14:29:44,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:29:44,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:44,735 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:44,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 14:29:47,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:29:47,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:47,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:47,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:48,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:29:48,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:29:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:29:48,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:29:48,435 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:48,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852781851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:48,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:48,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:29:48,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064173608] [2021-08-06 14:29:48,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:48,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:48,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:48,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:48,436 INFO L87 Difference]: Start difference. First operand 714 states and 2229 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:49,795 INFO L93 Difference]: Finished difference Result 1111 states and 3316 transitions. [2021-08-06 14:29:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 14:29:49,796 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:49,797 INFO L225 Difference]: With dead ends: 1111 [2021-08-06 14:29:49,797 INFO L226 Difference]: Without dead ends: 1023 [2021-08-06 14:29:49,798 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1198.4ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 14:29:49,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2021-08-06 14:29:49,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 718. [2021-08-06 14:29:49,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 3.1366806136680614) internal successors, (2249), 717 states have internal predecessors, (2249), 0 states have call successors, (0), 0 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 14:29:49,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 2249 transitions. [2021-08-06 14:29:49,807 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 2249 transitions. Word has length 24 [2021-08-06 14:29:49,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:49,807 INFO L470 AbstractCegarLoop]: Abstraction has 718 states and 2249 transitions. [2021-08-06 14:29:49,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:49,807 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 2249 transitions. [2021-08-06 14:29:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:49,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:49,808 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:49,834 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-06 14:29:50,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 14:29:50,008 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -606840117, now seen corresponding path program 90 times [2021-08-06 14:29:50,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:50,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24911200] [2021-08-06 14:29:50,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:50,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:50,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:50,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:29:50,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:50,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24911200] [2021-08-06 14:29:50,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24911200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:50,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56476948] [2021-08-06 14:29:50,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:29:50,197 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:50,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:50,197 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:50,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 14:29:53,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:29:53,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:29:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:29:53,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:53,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:29:53,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:29:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:29:53,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56476948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:53,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:53,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:29:53,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598666786] [2021-08-06 14:29:53,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:29:53,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:29:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:29:53,993 INFO L87 Difference]: Start difference. First operand 718 states and 2249 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:54,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:54,524 INFO L93 Difference]: Finished difference Result 1398 states and 4071 transitions. [2021-08-06 14:29:54,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:54,524 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:54,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:54,526 INFO L225 Difference]: With dead ends: 1398 [2021-08-06 14:29:54,526 INFO L226 Difference]: Without dead ends: 1360 [2021-08-06 14:29:54,527 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 508.8ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:29:54,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1360 states. [2021-08-06 14:29:54,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1360 to 722. [2021-08-06 14:29:54,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 3.1414701803051317) internal successors, (2265), 721 states have internal predecessors, (2265), 0 states have call successors, (0), 0 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 14:29:54,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 2265 transitions. [2021-08-06 14:29:54,537 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 2265 transitions. Word has length 24 [2021-08-06 14:29:54,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:54,537 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 2265 transitions. [2021-08-06 14:29:54,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:54,538 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 2265 transitions. [2021-08-06 14:29:54,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:54,538 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:54,539 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:54,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 14:29:54,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-08-06 14:29:54,739 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:54,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:54,739 INFO L82 PathProgramCache]: Analyzing trace with hash -66653557, now seen corresponding path program 91 times [2021-08-06 14:29:54,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:54,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445895706] [2021-08-06 14:29:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:54,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:54,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:54,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445895706] [2021-08-06 14:29:54,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445895706] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:54,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839156518] [2021-08-06 14:29:54,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:29:54,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:54,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:54,965 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:54,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 14:29:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:29:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:29:58,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:29:58,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2021-08-06 14:29:58,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-08-06 14:29:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:58,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839156518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:58,826 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:29:58,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:29:58,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022219964] [2021-08-06 14:29:58,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:29:58,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:29:58,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:29:58,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:29:58,826 INFO L87 Difference]: Start difference. First operand 722 states and 2265 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:29:59,452 INFO L93 Difference]: Finished difference Result 1283 states and 3810 transitions. [2021-08-06 14:29:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:29:59,453 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:29:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:29:59,455 INFO L225 Difference]: With dead ends: 1283 [2021-08-06 14:29:59,455 INFO L226 Difference]: Without dead ends: 1197 [2021-08-06 14:29:59,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 588.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:29:59,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1197 states. [2021-08-06 14:29:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1197 to 744. [2021-08-06 14:29:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.1574697173620456) internal successors, (2346), 743 states have internal predecessors, (2346), 0 states have call successors, (0), 0 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 14:29:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2346 transitions. [2021-08-06 14:29:59,465 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2346 transitions. Word has length 24 [2021-08-06 14:29:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:29:59,465 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2346 transitions. [2021-08-06 14:29:59,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:29:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2346 transitions. [2021-08-06 14:29:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:29:59,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:29:59,466 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:29:59,492 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 14:29:59,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:59,667 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:29:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:29:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash 2012640271, now seen corresponding path program 92 times [2021-08-06 14:29:59,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:29:59,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018468342] [2021-08-06 14:29:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:29:59,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:29:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:29:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:29:59,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:29:59,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018468342] [2021-08-06 14:29:59,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018468342] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:29:59,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185618769] [2021-08-06 14:29:59,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:29:59,926 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:29:59,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:29:59,928 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:29:59,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 14:30:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:03,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:03,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:03,546 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:30:03,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:30:03,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:30:03,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:03,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185618769] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:03,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:03,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:30:03,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776453631] [2021-08-06 14:30:03,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:03,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:03,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:03,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:03,845 INFO L87 Difference]: Start difference. First operand 744 states and 2346 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:04,614 INFO L93 Difference]: Finished difference Result 1353 states and 4019 transitions. [2021-08-06 14:30:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:30:04,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:04,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:04,617 INFO L225 Difference]: With dead ends: 1353 [2021-08-06 14:30:04,617 INFO L226 Difference]: Without dead ends: 1281 [2021-08-06 14:30:04,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:30:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1281 states. [2021-08-06 14:30:04,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1281 to 751. [2021-08-06 14:30:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 751 states, 750 states have (on average 3.1653333333333333) internal successors, (2374), 750 states have internal predecessors, (2374), 0 states have call successors, (0), 0 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 14:30:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 751 states to 751 states and 2374 transitions. [2021-08-06 14:30:04,627 INFO L78 Accepts]: Start accepts. Automaton has 751 states and 2374 transitions. Word has length 24 [2021-08-06 14:30:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:04,627 INFO L470 AbstractCegarLoop]: Abstraction has 751 states and 2374 transitions. [2021-08-06 14:30:04,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 751 states and 2374 transitions. [2021-08-06 14:30:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:04,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:04,628 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:04,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-06 14:30:04,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:04,835 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:04,835 INFO L82 PathProgramCache]: Analyzing trace with hash 285880277, now seen corresponding path program 93 times [2021-08-06 14:30:04,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:04,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122336276] [2021-08-06 14:30:04,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:04,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:05,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:05,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122336276] [2021-08-06 14:30:05,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122336276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:05,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984260020] [2021-08-06 14:30:05,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:05,088 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:05,089 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:05,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 14:30:08,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:30:08,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:08,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:08,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:08,822 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:08,822 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 37 treesize of output 34 [2021-08-06 14:30:09,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-06 14:30:09,211 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:09,211 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 19 treesize of output 18 [2021-08-06 14:30:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:09,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984260020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:09,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:09,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:30:09,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942741472] [2021-08-06 14:30:09,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:09,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:09,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:09,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:09,309 INFO L87 Difference]: Start difference. First operand 751 states and 2374 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:10,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:10,611 INFO L93 Difference]: Finished difference Result 1206 states and 3619 transitions. [2021-08-06 14:30:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:30:10,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:10,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:10,613 INFO L225 Difference]: With dead ends: 1206 [2021-08-06 14:30:10,613 INFO L226 Difference]: Without dead ends: 1096 [2021-08-06 14:30:10,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1095.8ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:30:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-08-06 14:30:10,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 757. [2021-08-06 14:30:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1785714285714284) internal successors, (2403), 756 states have internal predecessors, (2403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2403 transitions. [2021-08-06 14:30:10,623 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2403 transitions. Word has length 24 [2021-08-06 14:30:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:10,623 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2403 transitions. [2021-08-06 14:30:10,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2403 transitions. [2021-08-06 14:30:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:10,624 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:10,624 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:10,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:10,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:10,825 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:10,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1706703037, now seen corresponding path program 94 times [2021-08-06 14:30:10,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:10,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988667548] [2021-08-06 14:30:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:10,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:11,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:11,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988667548] [2021-08-06 14:30:11,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988667548] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:11,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787273671] [2021-08-06 14:30:11,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:30:11,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:11,086 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:11,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 14:30:14,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:30:14,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:14,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:14,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:30:15,080 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:15,081 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 39 treesize of output 36 [2021-08-06 14:30:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:15,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787273671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:15,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:15,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:30:15,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628235433] [2021-08-06 14:30:15,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:30:15,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:15,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:30:15,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:15,266 INFO L87 Difference]: Start difference. First operand 757 states and 2403 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:15,639 INFO L93 Difference]: Finished difference Result 1147 states and 3530 transitions. [2021-08-06 14:30:15,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:30:15,639 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:15,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:15,641 INFO L225 Difference]: With dead ends: 1147 [2021-08-06 14:30:15,641 INFO L226 Difference]: Without dead ends: 1081 [2021-08-06 14:30:15,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 392.3ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:30:15,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-08-06 14:30:15,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 768. [2021-08-06 14:30:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 3.182529335071708) internal successors, (2441), 767 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 2441 transitions. [2021-08-06 14:30:15,651 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 2441 transitions. Word has length 24 [2021-08-06 14:30:15,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:15,651 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 2441 transitions. [2021-08-06 14:30:15,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:15,652 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 2441 transitions. [2021-08-06 14:30:15,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:15,653 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:15,653 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:15,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:15,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-08-06 14:30:15,854 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash -337223599, now seen corresponding path program 95 times [2021-08-06 14:30:15,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:15,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485851489] [2021-08-06 14:30:15,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:15,854 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:16,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:16,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485851489] [2021-08-06 14:30:16,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485851489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:16,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736858802] [2021-08-06 14:30:16,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:30:16,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:16,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:16,067 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:16,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 14:30:19,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:30:19,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:19,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:19,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:19,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:30:19,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:30:19,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:30:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736858802] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:19,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:30:19,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611987317] [2021-08-06 14:30:19,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:30:19,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:30:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:30:19,961 INFO L87 Difference]: Start difference. First operand 768 states and 2441 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:20,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:20,336 INFO L93 Difference]: Finished difference Result 928 states and 2899 transitions. [2021-08-06 14:30:20,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:30:20,336 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:20,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:20,338 INFO L225 Difference]: With dead ends: 928 [2021-08-06 14:30:20,338 INFO L226 Difference]: Without dead ends: 869 [2021-08-06 14:30:20,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:30:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2021-08-06 14:30:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 782. [2021-08-06 14:30:20,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.179257362355954) internal successors, (2483), 781 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 14:30:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2483 transitions. [2021-08-06 14:30:20,347 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2483 transitions. Word has length 24 [2021-08-06 14:30:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:20,347 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2483 transitions. [2021-08-06 14:30:20,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2483 transitions. [2021-08-06 14:30:20,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:20,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:20,348 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:20,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:20,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2021-08-06 14:30:20,549 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1742070229, now seen corresponding path program 96 times [2021-08-06 14:30:20,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:20,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533105179] [2021-08-06 14:30:20,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:20,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:20,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:20,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:20,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533105179] [2021-08-06 14:30:20,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533105179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:20,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430102755] [2021-08-06 14:30:20,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:30:20,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:20,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:20,721 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:20,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 14:30:24,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:30:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:30:24,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:24,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:30:24,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:30:24,816 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:24,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430102755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:24,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:24,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:30:24,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212276680] [2021-08-06 14:30:24,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:24,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:24,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:24,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:24,817 INFO L87 Difference]: Start difference. First operand 782 states and 2483 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:25,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:25,159 INFO L93 Difference]: Finished difference Result 914 states and 2842 transitions. [2021-08-06 14:30:25,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:30:25,159 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:25,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:25,160 INFO L225 Difference]: With dead ends: 914 [2021-08-06 14:30:25,160 INFO L226 Difference]: Without dead ends: 854 [2021-08-06 14:30:25,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 280.9ms TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:30:25,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2021-08-06 14:30:25,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 782. [2021-08-06 14:30:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.179257362355954) internal successors, (2483), 781 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 14:30:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2483 transitions. [2021-08-06 14:30:25,181 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2483 transitions. Word has length 24 [2021-08-06 14:30:25,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:25,181 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2483 transitions. [2021-08-06 14:30:25,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:25,181 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2483 transitions. [2021-08-06 14:30:25,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:25,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:25,182 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:25,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-06 14:30:25,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 14:30:25,383 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:25,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:25,384 INFO L82 PathProgramCache]: Analyzing trace with hash -406726307, now seen corresponding path program 97 times [2021-08-06 14:30:25,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:25,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044674183] [2021-08-06 14:30:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:25,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:25,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:25,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044674183] [2021-08-06 14:30:25,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044674183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:25,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591169856] [2021-08-06 14:30:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:25,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:25,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:25,525 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:25,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 14:30:29,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:29,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:29,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:29,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:30:29,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:30:29,607 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:29,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591169856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:29,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:29,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:30:29,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149847243] [2021-08-06 14:30:29,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:29,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:29,609 INFO L87 Difference]: Start difference. First operand 782 states and 2483 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:29,908 INFO L93 Difference]: Finished difference Result 982 states and 3048 transitions. [2021-08-06 14:30:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:30:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:29,910 INFO L225 Difference]: With dead ends: 982 [2021-08-06 14:30:29,910 INFO L226 Difference]: Without dead ends: 920 [2021-08-06 14:30:29,910 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 267.0ms TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:30:29,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-08-06 14:30:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 782. [2021-08-06 14:30:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 3.179257362355954) internal successors, (2483), 781 states have internal predecessors, (2483), 0 states have call successors, (0), 0 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 14:30:29,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 2483 transitions. [2021-08-06 14:30:29,920 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 2483 transitions. Word has length 24 [2021-08-06 14:30:29,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:29,920 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 2483 transitions. [2021-08-06 14:30:29,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:29,920 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 2483 transitions. [2021-08-06 14:30:29,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:29,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:29,922 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:29,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 14:30:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:30,137 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:30,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1503270689, now seen corresponding path program 98 times [2021-08-06 14:30:30,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:30,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164967642] [2021-08-06 14:30:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:30,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:30,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:30,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:30,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164967642] [2021-08-06 14:30:30,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164967642] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:30,377 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861998675] [2021-08-06 14:30:30,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:30:30,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:30,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:30,378 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:30,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 14:30:34,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:30:34,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:34,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:34,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:34,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:30:34,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:30:34,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:34,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861998675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:34,543 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:34,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:30:34,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630664741] [2021-08-06 14:30:34,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:30:34,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:34,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:30:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:30:34,544 INFO L87 Difference]: Start difference. First operand 782 states and 2483 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:34,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:34,986 INFO L93 Difference]: Finished difference Result 931 states and 2894 transitions. [2021-08-06 14:30:34,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:30:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:34,988 INFO L225 Difference]: With dead ends: 931 [2021-08-06 14:30:34,988 INFO L226 Difference]: Without dead ends: 900 [2021-08-06 14:30:34,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:30:34,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2021-08-06 14:30:34,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 790. [2021-08-06 14:30:34,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.178707224334601) internal successors, (2508), 789 states have internal predecessors, (2508), 0 states have call successors, (0), 0 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 14:30:34,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2508 transitions. [2021-08-06 14:30:34,997 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2508 transitions. Word has length 24 [2021-08-06 14:30:34,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:34,998 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2508 transitions. [2021-08-06 14:30:34,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:34,998 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2508 transitions. [2021-08-06 14:30:34,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:34,999 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:34,999 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:35,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 14:30:35,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 14:30:35,199 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:35,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:35,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1627763433, now seen corresponding path program 99 times [2021-08-06 14:30:35,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:35,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327567100] [2021-08-06 14:30:35,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:35,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:35,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:35,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:35,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:35,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327567100] [2021-08-06 14:30:35,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327567100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:35,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976852710] [2021-08-06 14:30:35,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:30:35,427 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:35,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:35,427 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:35,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 14:30:39,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:30:39,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:39,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:39,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:39,438 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:39,439 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 37 treesize of output 34 [2021-08-06 14:30:39,646 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:39,646 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 41 treesize of output 38 [2021-08-06 14:30:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:30:39,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:30:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:39,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976852710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:39,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:39,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:30:39,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946286358] [2021-08-06 14:30:39,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:39,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:39,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:39,936 INFO L87 Difference]: Start difference. First operand 790 states and 2508 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:30:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:40,449 INFO L93 Difference]: Finished difference Result 1010 states and 3085 transitions. [2021-08-06 14:30:40,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:30:40,449 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:30:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:40,451 INFO L225 Difference]: With dead ends: 1010 [2021-08-06 14:30:40,451 INFO L226 Difference]: Without dead ends: 963 [2021-08-06 14:30:40,451 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:30:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-08-06 14:30:40,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 792. [2021-08-06 14:30:40,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.185840707964602) internal successors, (2520), 791 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 14:30:40,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2520 transitions. [2021-08-06 14:30:40,461 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2520 transitions. Word has length 24 [2021-08-06 14:30:40,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:40,461 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2520 transitions. [2021-08-06 14:30:40,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:30:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2520 transitions. [2021-08-06 14:30:40,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:40,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:40,462 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:40,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 14:30:40,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 14:30:40,665 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:40,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:40,665 INFO L82 PathProgramCache]: Analyzing trace with hash -655022047, now seen corresponding path program 100 times [2021-08-06 14:30:40,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:40,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884655119] [2021-08-06 14:30:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:40,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:40,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:30:40,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:40,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884655119] [2021-08-06 14:30:40,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884655119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:40,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591519440] [2021-08-06 14:30:40,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:30:40,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:40,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:40,896 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:40,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 14:30:44,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:30:44,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:44,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:44,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:45,085 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:45,085 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 37 treesize of output 34 [2021-08-06 14:30:45,484 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:45,484 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 33 treesize of output 30 [2021-08-06 14:30:45,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2021-08-06 14:30:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:30:45,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591519440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:45,581 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:45,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:30:45,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284222071] [2021-08-06 14:30:45,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:45,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:45,581 INFO L87 Difference]: Start difference. First operand 792 states and 2520 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:46,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:46,092 INFO L93 Difference]: Finished difference Result 1000 states and 3085 transitions. [2021-08-06 14:30:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:30:46,092 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:46,094 INFO L225 Difference]: With dead ends: 1000 [2021-08-06 14:30:46,094 INFO L226 Difference]: Without dead ends: 981 [2021-08-06 14:30:46,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:30:46,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-08-06 14:30:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 796. [2021-08-06 14:30:46,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 796 states, 795 states have (on average 3.189937106918239) internal successors, (2536), 795 states have internal predecessors, (2536), 0 states have call successors, (0), 0 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 14:30:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 796 states to 796 states and 2536 transitions. [2021-08-06 14:30:46,104 INFO L78 Accepts]: Start accepts. Automaton has 796 states and 2536 transitions. Word has length 24 [2021-08-06 14:30:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:46,104 INFO L470 AbstractCegarLoop]: Abstraction has 796 states and 2536 transitions. [2021-08-06 14:30:46,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 796 states and 2536 transitions. [2021-08-06 14:30:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:46,105 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:46,105 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:46,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2021-08-06 14:30:46,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:46,306 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:46,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:46,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1592590305, now seen corresponding path program 101 times [2021-08-06 14:30:46,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:46,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67316632] [2021-08-06 14:30:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:46,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:46,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:46,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67316632] [2021-08-06 14:30:46,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67316632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:46,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924082379] [2021-08-06 14:30:46,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:30:46,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:46,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:46,533 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:46,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 14:30:50,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:30:50,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:50,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:30:50,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:50,604 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:50,605 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 37 treesize of output 34 [2021-08-06 14:30:50,985 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:50,986 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 24 [2021-08-06 14:30:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:30:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:51,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924082379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:51,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:51,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:30:51,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408866030] [2021-08-06 14:30:51,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:30:51,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:30:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:30:51,153 INFO L87 Difference]: Start difference. First operand 796 states and 2536 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:51,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:51,663 INFO L93 Difference]: Finished difference Result 1074 states and 3333 transitions. [2021-08-06 14:30:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:30:51,664 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:51,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:51,665 INFO L225 Difference]: With dead ends: 1074 [2021-08-06 14:30:51,665 INFO L226 Difference]: Without dead ends: 1016 [2021-08-06 14:30:51,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:30:51,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2021-08-06 14:30:51,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 792. [2021-08-06 14:30:51,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.185840707964602) internal successors, (2520), 791 states have internal predecessors, (2520), 0 states have call successors, (0), 0 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 14:30:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2520 transitions. [2021-08-06 14:30:51,675 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2520 transitions. Word has length 24 [2021-08-06 14:30:51,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:51,675 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2520 transitions. [2021-08-06 14:30:51,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:51,675 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2520 transitions. [2021-08-06 14:30:51,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:51,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:51,676 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:51,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 14:30:51,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:51,877 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:51,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:51,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1344090349, now seen corresponding path program 102 times [2021-08-06 14:30:51,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:51,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468678276] [2021-08-06 14:30:51,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:51,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:51,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:52,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468678276] [2021-08-06 14:30:52,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468678276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:52,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358230300] [2021-08-06 14:30:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:30:52,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:52,197 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:52,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 14:30:56,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:30:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:30:56,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:30:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:30:56,357 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:56,357 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 37 treesize of output 34 [2021-08-06 14:30:56,486 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:30:56,486 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 41 treesize of output 38 [2021-08-06 14:30:56,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:30:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:30:56,815 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:56,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358230300] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:56,816 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:30:56,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:30:56,816 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098029560] [2021-08-06 14:30:56,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:30:56,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:30:56,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:30:56,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:30:56,816 INFO L87 Difference]: Start difference. First operand 792 states and 2520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:30:57,683 INFO L93 Difference]: Finished difference Result 1267 states and 3844 transitions. [2021-08-06 14:30:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:30:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:30:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:30:57,685 INFO L225 Difference]: With dead ends: 1267 [2021-08-06 14:30:57,685 INFO L226 Difference]: Without dead ends: 1187 [2021-08-06 14:30:57,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 838.2ms TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:30:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2021-08-06 14:30:57,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 795. [2021-08-06 14:30:57,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 3.18639798488665) internal successors, (2530), 794 states have internal predecessors, (2530), 0 states have call successors, (0), 0 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 14:30:57,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 2530 transitions. [2021-08-06 14:30:57,696 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 2530 transitions. Word has length 24 [2021-08-06 14:30:57,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:30:57,696 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 2530 transitions. [2021-08-06 14:30:57,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:30:57,696 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 2530 transitions. [2021-08-06 14:30:57,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:30:57,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:30:57,697 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:30:57,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 14:30:57,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 14:30:57,898 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:30:57,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:30:57,898 INFO L82 PathProgramCache]: Analyzing trace with hash -838632941, now seen corresponding path program 103 times [2021-08-06 14:30:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:30:57,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276481491] [2021-08-06 14:30:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:30:57,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:30:57,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:30:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:30:58,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:30:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276481491] [2021-08-06 14:30:58,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276481491] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:30:58,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844797016] [2021-08-06 14:30:58,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:30:58,178 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:30:58,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:30:58,178 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:30:58,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 14:31:01,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:01,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:01,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:02,151 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:02,151 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 37 treesize of output 34 [2021-08-06 14:31:02,255 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:02,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2021-08-06 14:31:02,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:31:02,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:31:02,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:02,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844797016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:02,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:02,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:31:02,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992225402] [2021-08-06 14:31:02,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:02,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:02,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:02,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:02,594 INFO L87 Difference]: Start difference. First operand 795 states and 2530 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:03,292 INFO L93 Difference]: Finished difference Result 1272 states and 3840 transitions. [2021-08-06 14:31:03,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:31:03,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:03,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:03,295 INFO L225 Difference]: With dead ends: 1272 [2021-08-06 14:31:03,295 INFO L226 Difference]: Without dead ends: 1214 [2021-08-06 14:31:03,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:31:03,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1214 states. [2021-08-06 14:31:03,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1214 to 802. [2021-08-06 14:31:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 802 states, 801 states have (on average 3.209737827715356) internal successors, (2571), 801 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 2571 transitions. [2021-08-06 14:31:03,306 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 2571 transitions. Word has length 24 [2021-08-06 14:31:03,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:03,306 INFO L470 AbstractCegarLoop]: Abstraction has 802 states and 2571 transitions. [2021-08-06 14:31:03,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:03,306 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 2571 transitions. [2021-08-06 14:31:03,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:03,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:03,307 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:03,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-06 14:31:03,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:03,508 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:03,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:03,508 INFO L82 PathProgramCache]: Analyzing trace with hash -11245457, now seen corresponding path program 104 times [2021-08-06 14:31:03,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:03,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905919502] [2021-08-06 14:31:03,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:03,508 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:03,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:03,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905919502] [2021-08-06 14:31:03,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905919502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:03,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42217154] [2021-08-06 14:31:03,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:31:03,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:03,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:03,716 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:03,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 14:31:07,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:07,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:07,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:07,843 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:07,843 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 23 treesize of output 22 [2021-08-06 14:31:07,894 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:07,894 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 24 [2021-08-06 14:31:07,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:31:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42217154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:08,153 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:08,153 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:31:08,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112693989] [2021-08-06 14:31:08,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:31:08,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:31:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:31:08,153 INFO L87 Difference]: Start difference. First operand 802 states and 2571 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:31:08,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:08,609 INFO L93 Difference]: Finished difference Result 1053 states and 3295 transitions. [2021-08-06 14:31:08,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:31:08,609 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 14:31:08,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:08,611 INFO L225 Difference]: With dead ends: 1053 [2021-08-06 14:31:08,611 INFO L226 Difference]: Without dead ends: 992 [2021-08-06 14:31:08,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 403.8ms TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:31:08,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-08-06 14:31:08,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 816. [2021-08-06 14:31:08,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.214723926380368) internal successors, (2620), 815 states have internal predecessors, (2620), 0 states have call successors, (0), 0 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 14:31:08,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2620 transitions. [2021-08-06 14:31:08,621 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2620 transitions. Word has length 24 [2021-08-06 14:31:08,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:08,621 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2620 transitions. [2021-08-06 14:31:08,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:31:08,621 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2620 transitions. [2021-08-06 14:31:08,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:08,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:08,622 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:08,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:08,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:08,823 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:08,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:08,823 INFO L82 PathProgramCache]: Analyzing trace with hash 372229527, now seen corresponding path program 105 times [2021-08-06 14:31:08,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:08,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738646057] [2021-08-06 14:31:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:08,824 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:09,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:09,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738646057] [2021-08-06 14:31:09,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738646057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:09,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153444829] [2021-08-06 14:31:09,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:31:09,004 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:09,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:09,004 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:09,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 14:31:12,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:31:12,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:13,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:31:13,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:31:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:13,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153444829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:13,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:13,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 14:31:13,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166132393] [2021-08-06 14:31:13,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 14:31:13,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:13,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 14:31:13,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-08-06 14:31:13,376 INFO L87 Difference]: Start difference. First operand 816 states and 2620 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:13,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:13,655 INFO L93 Difference]: Finished difference Result 1022 states and 3226 transitions. [2021-08-06 14:31:13,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:31:13,656 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:13,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:13,657 INFO L225 Difference]: With dead ends: 1022 [2021-08-06 14:31:13,657 INFO L226 Difference]: Without dead ends: 991 [2021-08-06 14:31:13,658 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 246.8ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:31:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2021-08-06 14:31:13,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 816. [2021-08-06 14:31:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.214723926380368) internal successors, (2620), 815 states have internal predecessors, (2620), 0 states have call successors, (0), 0 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 14:31:13,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2620 transitions. [2021-08-06 14:31:13,667 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2620 transitions. Word has length 24 [2021-08-06 14:31:13,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:13,667 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2620 transitions. [2021-08-06 14:31:13,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:13,667 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2620 transitions. [2021-08-06 14:31:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:13,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:13,669 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:13,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:13,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2021-08-06 14:31:13,889 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:13,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:13,889 INFO L82 PathProgramCache]: Analyzing trace with hash -209531253, now seen corresponding path program 106 times [2021-08-06 14:31:13,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:13,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478392179] [2021-08-06 14:31:13,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:13,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:14,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:14,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:14,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478392179] [2021-08-06 14:31:14,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478392179] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:14,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420688290] [2021-08-06 14:31:14,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:31:14,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:14,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:14,177 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:14,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 14:31:18,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:18,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:31:18,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:18,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:18,322 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 37 treesize of output 34 [2021-08-06 14:31:18,439 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:18,439 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 41 treesize of output 38 [2021-08-06 14:31:18,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:31:18,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:31:18,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:18,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420688290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:18,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:18,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:31:18,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906247033] [2021-08-06 14:31:18,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:18,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:18,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:18,786 INFO L87 Difference]: Start difference. First operand 816 states and 2620 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:19,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:19,710 INFO L93 Difference]: Finished difference Result 1260 states and 3885 transitions. [2021-08-06 14:31:19,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:31:19,711 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:19,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:19,713 INFO L225 Difference]: With dead ends: 1260 [2021-08-06 14:31:19,713 INFO L226 Difference]: Without dead ends: 1180 [2021-08-06 14:31:19,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 878.7ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:31:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2021-08-06 14:31:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 830. [2021-08-06 14:31:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.2291917973462003) internal successors, (2677), 829 states have internal predecessors, (2677), 0 states have call successors, (0), 0 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 14:31:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2677 transitions. [2021-08-06 14:31:19,724 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2677 transitions. Word has length 24 [2021-08-06 14:31:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:19,724 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2677 transitions. [2021-08-06 14:31:19,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2677 transitions. [2021-08-06 14:31:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:19,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:19,725 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:19,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:19,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:19,926 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:19,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:19,926 INFO L82 PathProgramCache]: Analyzing trace with hash 295926155, now seen corresponding path program 107 times [2021-08-06 14:31:19,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:19,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403612931] [2021-08-06 14:31:19,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:19,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:20,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:20,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403612931] [2021-08-06 14:31:20,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403612931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:20,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135092316] [2021-08-06 14:31:20,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:20,209 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:20,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:20,210 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:20,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 14:31:24,273 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:31:24,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:24,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:24,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:24,494 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:24,494 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 37 treesize of output 34 [2021-08-06 14:31:24,605 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:24,606 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 41 treesize of output 38 [2021-08-06 14:31:24,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:31:24,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:31:24,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:24,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135092316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:24,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:24,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:31:24,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694044026] [2021-08-06 14:31:24,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:24,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:24,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:24,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:24,962 INFO L87 Difference]: Start difference. First operand 830 states and 2677 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:25,625 INFO L93 Difference]: Finished difference Result 1257 states and 3835 transitions. [2021-08-06 14:31:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:31:25,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:25,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:25,627 INFO L225 Difference]: With dead ends: 1257 [2021-08-06 14:31:25,627 INFO L226 Difference]: Without dead ends: 1168 [2021-08-06 14:31:25,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 617.4ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:31:25,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2021-08-06 14:31:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 827. [2021-08-06 14:31:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 826 states have (on average 3.2288135593220337) internal successors, (2667), 826 states have internal predecessors, (2667), 0 states have call successors, (0), 0 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 14:31:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 2667 transitions. [2021-08-06 14:31:25,638 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 2667 transitions. Word has length 24 [2021-08-06 14:31:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:25,638 INFO L470 AbstractCegarLoop]: Abstraction has 827 states and 2667 transitions. [2021-08-06 14:31:25,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:25,639 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 2667 transitions. [2021-08-06 14:31:25,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:25,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:25,640 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:25,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-06 14:31:25,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 14:31:25,840 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:25,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:25,841 INFO L82 PathProgramCache]: Analyzing trace with hash 200448673, now seen corresponding path program 108 times [2021-08-06 14:31:25,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:25,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467887142] [2021-08-06 14:31:25,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:25,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:25,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:26,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:26,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467887142] [2021-08-06 14:31:26,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467887142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:26,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649152999] [2021-08-06 14:31:26,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:31:26,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:26,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:26,134 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:26,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 14:31:30,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:31:30,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:30,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:30,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:30,428 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:30,428 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 37 treesize of output 34 [2021-08-06 14:31:30,580 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:31:30,580 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 24 [2021-08-06 14:31:30,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:31:30,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:30,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649152999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:30,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:30,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:31:30,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202308541] [2021-08-06 14:31:30,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:31:30,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:30,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:31:30,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:30,781 INFO L87 Difference]: Start difference. First operand 827 states and 2667 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:31,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:31,618 INFO L93 Difference]: Finished difference Result 1254 states and 3863 transitions. [2021-08-06 14:31:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:31:31,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:31,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:31,621 INFO L225 Difference]: With dead ends: 1254 [2021-08-06 14:31:31,621 INFO L226 Difference]: Without dead ends: 1165 [2021-08-06 14:31:31,621 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 776.7ms TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:31:31,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2021-08-06 14:31:31,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 834. [2021-08-06 14:31:31,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.2436974789915967) internal successors, (2702), 833 states have internal predecessors, (2702), 0 states have call successors, (0), 0 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 14:31:31,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2702 transitions. [2021-08-06 14:31:31,632 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2702 transitions. Word has length 24 [2021-08-06 14:31:31,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:31,632 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2702 transitions. [2021-08-06 14:31:31,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:31,632 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2702 transitions. [2021-08-06 14:31:31,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:31,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:31,633 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:31,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 14:31:31,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:31,834 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 638499663, now seen corresponding path program 109 times [2021-08-06 14:31:31,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:31,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50440690] [2021-08-06 14:31:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:31,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:32,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:32,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50440690] [2021-08-06 14:31:32,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50440690] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:32,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166326667] [2021-08-06 14:31:32,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:31:32,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:32,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:32,065 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:32,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 14:31:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:36,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:36,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:31:36,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:31:36,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:31:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:36,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166326667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:36,574 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:36,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:31:36,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72595029] [2021-08-06 14:31:36,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:36,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:36,575 INFO L87 Difference]: Start difference. First operand 834 states and 2702 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 14:31:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:36,869 INFO L93 Difference]: Finished difference Result 1300 states and 4076 transitions. [2021-08-06 14:31:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:31:36,869 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 24 [2021-08-06 14:31:36,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:36,871 INFO L225 Difference]: With dead ends: 1300 [2021-08-06 14:31:36,871 INFO L226 Difference]: Without dead ends: 1234 [2021-08-06 14:31:36,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 305.5ms TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:36,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2021-08-06 14:31:36,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 807. [2021-08-06 14:31:36,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 3.2245657568238215) internal successors, (2599), 806 states have internal predecessors, (2599), 0 states have call successors, (0), 0 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 14:31:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 2599 transitions. [2021-08-06 14:31:36,882 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 2599 transitions. Word has length 24 [2021-08-06 14:31:36,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:36,882 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 2599 transitions. [2021-08-06 14:31:36,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 14:31:36,882 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 2599 transitions. [2021-08-06 14:31:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:36,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:36,884 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:36,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:37,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 14:31:37,113 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:37,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:37,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1676730023, now seen corresponding path program 110 times [2021-08-06 14:31:37,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:37,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691881410] [2021-08-06 14:31:37,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:37,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:37,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691881410] [2021-08-06 14:31:37,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691881410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:37,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652001919] [2021-08-06 14:31:37,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:31:37,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:37,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:37,361 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:37,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 14:31:41,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:31:41,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:41,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:41,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:41,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:31:41,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:31:42,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:42,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652001919] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:42,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:42,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:31:42,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057382073] [2021-08-06 14:31:42,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:42,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:42,013 INFO L87 Difference]: Start difference. First operand 807 states and 2599 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:42,386 INFO L93 Difference]: Finished difference Result 1047 states and 3273 transitions. [2021-08-06 14:31:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:31:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:42,388 INFO L225 Difference]: With dead ends: 1047 [2021-08-06 14:31:42,388 INFO L226 Difference]: Without dead ends: 986 [2021-08-06 14:31:42,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:31:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2021-08-06 14:31:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 792. [2021-08-06 14:31:42,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.1896333754740835) internal successors, (2523), 791 states have internal predecessors, (2523), 0 states have call successors, (0), 0 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 14:31:42,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2523 transitions. [2021-08-06 14:31:42,398 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2523 transitions. Word has length 24 [2021-08-06 14:31:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:42,398 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2523 transitions. [2021-08-06 14:31:42,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:42,398 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2523 transitions. [2021-08-06 14:31:42,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:42,399 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:42,400 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:42,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:42,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 14:31:42,609 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:42,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:42,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1159139375, now seen corresponding path program 111 times [2021-08-06 14:31:42,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:42,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373315416] [2021-08-06 14:31:42,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:42,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:42,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:42,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373315416] [2021-08-06 14:31:42,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373315416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:42,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906995605] [2021-08-06 14:31:42,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:31:42,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:42,830 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:42,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 14:31:46,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 14:31:46,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:46,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:46,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:47,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:31:47,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:31:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:47,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906995605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:47,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:47,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:31:47,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086534931] [2021-08-06 14:31:47,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:31:47,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:47,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:31:47,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:31:47,404 INFO L87 Difference]: Start difference. First operand 792 states and 2523 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 14:31:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:47,867 INFO L93 Difference]: Finished difference Result 1038 states and 3243 transitions. [2021-08-06 14:31:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:31:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 24 [2021-08-06 14:31:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:47,869 INFO L225 Difference]: With dead ends: 1038 [2021-08-06 14:31:47,869 INFO L226 Difference]: Without dead ends: 979 [2021-08-06 14:31:47,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:31:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2021-08-06 14:31:47,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 801. [2021-08-06 14:31:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 800 states have (on average 3.17125) internal successors, (2537), 800 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 2537 transitions. [2021-08-06 14:31:47,878 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 2537 transitions. Word has length 24 [2021-08-06 14:31:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:47,878 INFO L470 AbstractCegarLoop]: Abstraction has 801 states and 2537 transitions. [2021-08-06 14:31:47,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 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 14:31:47,878 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 2537 transitions. [2021-08-06 14:31:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:47,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:47,880 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:47,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:48,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-08-06 14:31:48,081 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:48,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1769998667, now seen corresponding path program 112 times [2021-08-06 14:31:48,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:48,084 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633677031] [2021-08-06 14:31:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:48,084 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:48,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:48,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633677031] [2021-08-06 14:31:48,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633677031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:48,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710637596] [2021-08-06 14:31:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:31:48,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:48,242 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:48,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 14:31:52,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:31:52,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:52,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:52,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:52,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:31:52,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:31:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:52,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710637596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:52,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:52,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:31:52,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040872691] [2021-08-06 14:31:52,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:52,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:52,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:52,865 INFO L87 Difference]: Start difference. First operand 801 states and 2537 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:53,152 INFO L93 Difference]: Finished difference Result 972 states and 3052 transitions. [2021-08-06 14:31:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:31:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:53,154 INFO L225 Difference]: With dead ends: 972 [2021-08-06 14:31:53,154 INFO L226 Difference]: Without dead ends: 941 [2021-08-06 14:31:53,154 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 260.3ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2021-08-06 14:31:53,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 828. [2021-08-06 14:31:53,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1741233373639663) internal successors, (2625), 827 states have internal predecessors, (2625), 0 states have call successors, (0), 0 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 14:31:53,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2625 transitions. [2021-08-06 14:31:53,163 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2625 transitions. Word has length 24 [2021-08-06 14:31:53,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:53,164 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2625 transitions. [2021-08-06 14:31:53,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:53,164 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2625 transitions. [2021-08-06 14:31:53,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:53,165 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:53,165 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:53,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2021-08-06 14:31:53,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-08-06 14:31:53,369 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash -445674801, now seen corresponding path program 113 times [2021-08-06 14:31:53,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:53,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212691090] [2021-08-06 14:31:53,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:53,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:53,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:53,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:53,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:53,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212691090] [2021-08-06 14:31:53,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212691090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:53,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559739395] [2021-08-06 14:31:53,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:31:53,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:53,561 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:53,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 14:31:57,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:31:57,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:31:57,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:31:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:31:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:31:57,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:31:57,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:31:58,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:58,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559739395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:58,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:31:58,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:31:58,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638776116] [2021-08-06 14:31:58,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:31:58,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:31:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:31:58,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:31:58,059 INFO L87 Difference]: Start difference. First operand 828 states and 2625 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:58,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:31:58,403 INFO L93 Difference]: Finished difference Result 1086 states and 3330 transitions. [2021-08-06 14:31:58,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:31:58,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:31:58,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:31:58,405 INFO L225 Difference]: With dead ends: 1086 [2021-08-06 14:31:58,405 INFO L226 Difference]: Without dead ends: 1009 [2021-08-06 14:31:58,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 297.5ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:31:58,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2021-08-06 14:31:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 828. [2021-08-06 14:31:58,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1741233373639663) internal successors, (2625), 827 states have internal predecessors, (2625), 0 states have call successors, (0), 0 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 14:31:58,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2625 transitions. [2021-08-06 14:31:58,417 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2625 transitions. Word has length 24 [2021-08-06 14:31:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:31:58,418 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2625 transitions. [2021-08-06 14:31:58,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:31:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2625 transitions. [2021-08-06 14:31:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:31:58,419 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:31:58,419 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:31:58,451 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 14:31:58,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:58,619 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:31:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:31:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1700495959, now seen corresponding path program 114 times [2021-08-06 14:31:58,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:31:58,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128988385] [2021-08-06 14:31:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:31:58,620 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:31:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:31:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:31:58,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:31:58,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128988385] [2021-08-06 14:31:58,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128988385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:31:58,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331375617] [2021-08-06 14:31:58,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:31:58,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:31:58,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:31:58,786 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:31:58,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 14:32:03,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:32:03,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:03,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:03,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:03,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:32:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:32:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:03,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331375617] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:03,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:03,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-08-06 14:32:03,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129719861] [2021-08-06 14:32:03,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 14:32:03,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:03,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 14:32:03,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-08-06 14:32:03,349 INFO L87 Difference]: Start difference. First operand 828 states and 2625 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:03,553 INFO L93 Difference]: Finished difference Result 980 states and 3082 transitions. [2021-08-06 14:32:03,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:32:03,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:03,555 INFO L225 Difference]: With dead ends: 980 [2021-08-06 14:32:03,555 INFO L226 Difference]: Without dead ends: 949 [2021-08-06 14:32:03,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 205.6ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:03,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2021-08-06 14:32:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 828. [2021-08-06 14:32:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 3.1741233373639663) internal successors, (2625), 827 states have internal predecessors, (2625), 0 states have call successors, (0), 0 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 14:32:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 2625 transitions. [2021-08-06 14:32:03,564 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 2625 transitions. Word has length 24 [2021-08-06 14:32:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 828 states and 2625 transitions. [2021-08-06 14:32:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 2625 transitions. [2021-08-06 14:32:03,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:03,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:03,566 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:03,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 14:32:03,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:03,766 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:03,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:03,766 INFO L82 PathProgramCache]: Analyzing trace with hash 606404371, now seen corresponding path program 115 times [2021-08-06 14:32:03,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:03,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347346956] [2021-08-06 14:32:03,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:03,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:03,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:03,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:03,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:03,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347346956] [2021-08-06 14:32:03,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347346956] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:03,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549859839] [2021-08-06 14:32:03,930 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:03,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:03,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:03,931 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:03,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 14:32:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:08,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:08,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:32:08,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:32:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:08,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549859839] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:08,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:08,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:32:08,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50500466] [2021-08-06 14:32:08,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:32:08,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:08,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:32:08,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:32:08,690 INFO L87 Difference]: Start difference. First operand 828 states and 2625 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:09,167 INFO L93 Difference]: Finished difference Result 1300 states and 4019 transitions. [2021-08-06 14:32:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:32:09,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:09,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:09,169 INFO L225 Difference]: With dead ends: 1300 [2021-08-06 14:32:09,169 INFO L226 Difference]: Without dead ends: 1193 [2021-08-06 14:32:09,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 432.1ms TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:32:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2021-08-06 14:32:09,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 882. [2021-08-06 14:32:09,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.1782065834279227) internal successors, (2800), 881 states have internal predecessors, (2800), 0 states have call successors, (0), 0 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 14:32:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2800 transitions. [2021-08-06 14:32:09,181 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2800 transitions. Word has length 24 [2021-08-06 14:32:09,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:09,181 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2800 transitions. [2021-08-06 14:32:09,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:09,181 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2800 transitions. [2021-08-06 14:32:09,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:09,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:09,182 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:09,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 14:32:09,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:09,383 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:09,383 INFO L82 PathProgramCache]: Analyzing trace with hash 892868761, now seen corresponding path program 116 times [2021-08-06 14:32:09,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:09,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783095400] [2021-08-06 14:32:09,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:09,383 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:09,600 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:09,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:09,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783095400] [2021-08-06 14:32:09,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783095400] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:09,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205444682] [2021-08-06 14:32:09,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:09,601 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:09,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:09,601 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:09,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 14:32:13,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:13,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:13,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:13,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:14,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:32:14,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:32:14,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:14,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205444682] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:14,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:14,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:32:14,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095450184] [2021-08-06 14:32:14,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:32:14,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:14,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:32:14,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:32:14,407 INFO L87 Difference]: Start difference. First operand 882 states and 2800 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:14,862 INFO L93 Difference]: Finished difference Result 1085 states and 3345 transitions. [2021-08-06 14:32:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:32:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:14,864 INFO L225 Difference]: With dead ends: 1085 [2021-08-06 14:32:14,864 INFO L226 Difference]: Without dead ends: 1054 [2021-08-06 14:32:14,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:32:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-08-06 14:32:14,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 912. [2021-08-06 14:32:14,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.1789242590559823) internal successors, (2896), 911 states have internal predecessors, (2896), 0 states have call successors, (0), 0 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 14:32:14,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2896 transitions. [2021-08-06 14:32:14,876 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2896 transitions. Word has length 24 [2021-08-06 14:32:14,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:14,876 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2896 transitions. [2021-08-06 14:32:14,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2896 transitions. [2021-08-06 14:32:14,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:14,877 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:14,877 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:14,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:15,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:15,103 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:15,104 INFO L82 PathProgramCache]: Analyzing trace with hash 2056801935, now seen corresponding path program 117 times [2021-08-06 14:32:15,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:15,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511510626] [2021-08-06 14:32:15,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:15,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:15,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:15,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511510626] [2021-08-06 14:32:15,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511510626] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:15,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330497843] [2021-08-06 14:32:15,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:15,400 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:15,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:15,401 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:15,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 14:32:19,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:32:19,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:19,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:19,892 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:19,893 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 37 treesize of output 34 [2021-08-06 14:32:20,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-08-06 14:32:20,101 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:20,101 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 38 treesize of output 33 [2021-08-06 14:32:20,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:20,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330497843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:20,332 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:20,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:20,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063765375] [2021-08-06 14:32:20,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:20,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:20,333 INFO L87 Difference]: Start difference. First operand 912 states and 2896 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:32:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:20,891 INFO L93 Difference]: Finished difference Result 1126 states and 3441 transitions. [2021-08-06 14:32:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:32:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:32:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:20,893 INFO L225 Difference]: With dead ends: 1126 [2021-08-06 14:32:20,894 INFO L226 Difference]: Without dead ends: 1079 [2021-08-06 14:32:20,894 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:32:20,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2021-08-06 14:32:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 906. [2021-08-06 14:32:20,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.1878453038674035) internal successors, (2885), 905 states have internal predecessors, (2885), 0 states have call successors, (0), 0 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 14:32:20,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2885 transitions. [2021-08-06 14:32:20,905 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2885 transitions. Word has length 24 [2021-08-06 14:32:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:20,905 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2885 transitions. [2021-08-06 14:32:20,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:32:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2885 transitions. [2021-08-06 14:32:20,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:20,906 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:20,906 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:20,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2021-08-06 14:32:21,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:21,107 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1265423975, now seen corresponding path program 118 times [2021-08-06 14:32:21,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:21,107 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909417085] [2021-08-06 14:32:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:21,107 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:32:21,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:21,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909417085] [2021-08-06 14:32:21,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909417085] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:21,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910903135] [2021-08-06 14:32:21,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:21,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:21,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:21,330 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:21,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 14:32:25,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:32:25,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:25,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:25,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:32:26,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:32:26,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:32:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:32:26,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910903135] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:26,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:26,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:32:26,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689994477] [2021-08-06 14:32:26,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:32:26,194 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:26,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:32:26,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:32:26,195 INFO L87 Difference]: Start difference. First operand 906 states and 2885 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:26,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:26,684 INFO L93 Difference]: Finished difference Result 1190 states and 3680 transitions. [2021-08-06 14:32:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:32:26,684 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:26,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:26,686 INFO L225 Difference]: With dead ends: 1190 [2021-08-06 14:32:26,686 INFO L226 Difference]: Without dead ends: 1152 [2021-08-06 14:32:26,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:32:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2021-08-06 14:32:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 910. [2021-08-06 14:32:26,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 3.1914191419141913) internal successors, (2901), 909 states have internal predecessors, (2901), 0 states have call successors, (0), 0 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 14:32:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 2901 transitions. [2021-08-06 14:32:26,697 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 2901 transitions. Word has length 24 [2021-08-06 14:32:26,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:26,698 INFO L470 AbstractCegarLoop]: Abstraction has 910 states and 2901 transitions. [2021-08-06 14:32:26,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:26,698 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 2901 transitions. [2021-08-06 14:32:26,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:26,699 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:26,699 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:26,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-08-06 14:32:26,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 14:32:26,899 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:26,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:26,900 INFO L82 PathProgramCache]: Analyzing trace with hash 982188377, now seen corresponding path program 119 times [2021-08-06 14:32:26,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:26,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067485217] [2021-08-06 14:32:26,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:26,900 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:27,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:27,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067485217] [2021-08-06 14:32:27,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067485217] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:27,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670556463] [2021-08-06 14:32:27,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:32:27,130 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:27,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:27,131 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:27,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 14:32:31,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:32:31,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:31,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:31,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:31,697 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:31,697 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 37 treesize of output 34 [2021-08-06 14:32:32,040 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:32,041 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 24 [2021-08-06 14:32:32,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:32:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670556463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:32,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:32,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:32:32,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473322549] [2021-08-06 14:32:32,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:32:32,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:32,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:32:32,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:32:32,190 INFO L87 Difference]: Start difference. First operand 910 states and 2901 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:32,828 INFO L93 Difference]: Finished difference Result 1212 states and 3760 transitions. [2021-08-06 14:32:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:32:32,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:32,830 INFO L225 Difference]: With dead ends: 1212 [2021-08-06 14:32:32,830 INFO L226 Difference]: Without dead ends: 1154 [2021-08-06 14:32:32,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 510.5ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:32:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-08-06 14:32:32,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 906. [2021-08-06 14:32:32,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.1878453038674035) internal successors, (2885), 905 states have internal predecessors, (2885), 0 states have call successors, (0), 0 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 14:32:32,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2885 transitions. [2021-08-06 14:32:32,841 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2885 transitions. Word has length 24 [2021-08-06 14:32:32,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:32,842 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2885 transitions. [2021-08-06 14:32:32,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:32,842 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2885 transitions. [2021-08-06 14:32:32,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:32,843 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:32,843 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:32,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:33,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-08-06 14:32:33,043 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1954492277, now seen corresponding path program 120 times [2021-08-06 14:32:33,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:33,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248555659] [2021-08-06 14:32:33,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:33,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:33,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:33,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248555659] [2021-08-06 14:32:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248555659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:33,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065042362] [2021-08-06 14:32:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:32:33,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:33,313 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:33,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 14:32:37,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:32:37,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:37,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:32:37,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:38,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:38,129 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 37 treesize of output 34 [2021-08-06 14:32:38,241 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:38,241 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 41 treesize of output 38 [2021-08-06 14:32:38,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:32:38,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:32:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:38,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065042362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:38,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:38,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:32:38,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081089390] [2021-08-06 14:32:38,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:32:38,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:38,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:32:38,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:32:38,585 INFO L87 Difference]: Start difference. First operand 906 states and 2885 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:39,416 INFO L93 Difference]: Finished difference Result 1383 states and 4207 transitions. [2021-08-06 14:32:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 14:32:39,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:39,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:39,418 INFO L225 Difference]: With dead ends: 1383 [2021-08-06 14:32:39,418 INFO L226 Difference]: Without dead ends: 1303 [2021-08-06 14:32:39,419 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 793.3ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:32:39,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-08-06 14:32:39,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 909. [2021-08-06 14:32:39,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 3.1883259911894273) internal successors, (2895), 908 states have internal predecessors, (2895), 0 states have call successors, (0), 0 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 14:32:39,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 2895 transitions. [2021-08-06 14:32:39,431 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 2895 transitions. Word has length 24 [2021-08-06 14:32:39,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:39,431 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 2895 transitions. [2021-08-06 14:32:39,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 2895 transitions. [2021-08-06 14:32:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:39,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:39,432 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:39,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:39,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-08-06 14:32:39,632 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:39,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:39,633 INFO L82 PathProgramCache]: Analyzing trace with hash -1449034869, now seen corresponding path program 121 times [2021-08-06 14:32:39,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:39,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678350723] [2021-08-06 14:32:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:39,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:39,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:39,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:39,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:39,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678350723] [2021-08-06 14:32:39,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678350723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:39,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584733799] [2021-08-06 14:32:39,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:32:39,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:39,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:39,916 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:39,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-08-06 14:32:44,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:44,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:44,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:44,577 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:44,577 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 37 treesize of output 34 [2021-08-06 14:32:44,674 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:44,675 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 41 treesize of output 38 [2021-08-06 14:32:44,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:32:44,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:32:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:45,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584733799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:45,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:45,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:32:45,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194553648] [2021-08-06 14:32:45,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:32:45,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:45,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:32:45,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:32:45,030 INFO L87 Difference]: Start difference. First operand 909 states and 2895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:45,751 INFO L93 Difference]: Finished difference Result 1388 states and 4209 transitions. [2021-08-06 14:32:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:32:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:45,754 INFO L225 Difference]: With dead ends: 1388 [2021-08-06 14:32:45,754 INFO L226 Difference]: Without dead ends: 1330 [2021-08-06 14:32:45,754 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 710.6ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:32:45,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-08-06 14:32:45,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 915. [2021-08-06 14:32:45,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 914 states have (on average 3.2078774617067833) internal successors, (2932), 914 states have internal predecessors, (2932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 2932 transitions. [2021-08-06 14:32:45,768 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 2932 transitions. Word has length 24 [2021-08-06 14:32:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:45,768 INFO L470 AbstractCegarLoop]: Abstraction has 915 states and 2932 transitions. [2021-08-06 14:32:45,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 2932 transitions. [2021-08-06 14:32:45,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:45,769 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:45,769 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:45,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:45,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-08-06 14:32:45,970 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:45,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:45,970 INFO L82 PathProgramCache]: Analyzing trace with hash -621647385, now seen corresponding path program 122 times [2021-08-06 14:32:45,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:45,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949847596] [2021-08-06 14:32:45,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:45,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:45,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:46,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:46,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949847596] [2021-08-06 14:32:46,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949847596] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:46,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998796947] [2021-08-06 14:32:46,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:32:46,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:46,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:46,224 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:46,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-08-06 14:32:50,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:32:50,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:50,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:50,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:50,945 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:50,945 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 23 treesize of output 22 [2021-08-06 14:32:51,001 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:51,001 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 24 [2021-08-06 14:32:51,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:32:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:51,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998796947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:51,211 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:51,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:32:51,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102064394] [2021-08-06 14:32:51,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:32:51,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:32:51,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:32:51,212 INFO L87 Difference]: Start difference. First operand 915 states and 2932 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:51,591 INFO L93 Difference]: Finished difference Result 1154 states and 3652 transitions. [2021-08-06 14:32:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:32:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:51,594 INFO L225 Difference]: With dead ends: 1154 [2021-08-06 14:32:51,594 INFO L226 Difference]: Without dead ends: 1119 [2021-08-06 14:32:51,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:32:51,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-08-06 14:32:51,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 922. [2021-08-06 14:32:51,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 3.206297502714441) internal successors, (2953), 921 states have internal predecessors, (2953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 2953 transitions. [2021-08-06 14:32:51,605 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 2953 transitions. Word has length 24 [2021-08-06 14:32:51,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:51,605 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 2953 transitions. [2021-08-06 14:32:51,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:51,605 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 2953 transitions. [2021-08-06 14:32:51,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:51,606 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:51,606 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:51,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-08-06 14:32:51,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:51,806 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:51,807 INFO L82 PathProgramCache]: Analyzing trace with hash -238172401, now seen corresponding path program 123 times [2021-08-06 14:32:51,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:51,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752215439] [2021-08-06 14:32:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:51,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:52,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:52,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752215439] [2021-08-06 14:32:52,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752215439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:52,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687866066] [2021-08-06 14:32:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:32:52,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:52,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:52,010 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:52,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-08-06 14:32:56,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:32:56,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:32:56,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:32:56,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:32:56,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:56,955 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 23 treesize of output 22 [2021-08-06 14:32:57,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-06 14:32:57,007 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:32:57,007 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 19 treesize of output 18 [2021-08-06 14:32:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:57,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687866066] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:57,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:32:57,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:32:57,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91446895] [2021-08-06 14:32:57,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:32:57,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:32:57,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:32:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:32:57,124 INFO L87 Difference]: Start difference. First operand 922 states and 2953 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:32:57,458 INFO L93 Difference]: Finished difference Result 1134 states and 3566 transitions. [2021-08-06 14:32:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:32:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:32:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:32:57,460 INFO L225 Difference]: With dead ends: 1134 [2021-08-06 14:32:57,460 INFO L226 Difference]: Without dead ends: 1103 [2021-08-06 14:32:57,460 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:32:57,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-08-06 14:32:57,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 919. [2021-08-06 14:32:57,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 918 states have (on average 3.208061002178649) internal successors, (2945), 918 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 2945 transitions. [2021-08-06 14:32:57,471 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 2945 transitions. Word has length 24 [2021-08-06 14:32:57,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:32:57,472 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 2945 transitions. [2021-08-06 14:32:57,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:32:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 2945 transitions. [2021-08-06 14:32:57,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:32:57,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:32:57,473 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:32:57,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-08-06 14:32:57,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:57,681 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:32:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:32:57,681 INFO L82 PathProgramCache]: Analyzing trace with hash -819933181, now seen corresponding path program 124 times [2021-08-06 14:32:57,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:32:57,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035883553] [2021-08-06 14:32:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:32:57,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:32:57,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:32:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:32:57,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:32:57,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035883553] [2021-08-06 14:32:57,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035883553] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:32:57,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677429694] [2021-08-06 14:32:57,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:32:57,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:32:57,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:32:57,922 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:32:57,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-08-06 14:33:02,515 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:02,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:02,728 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:02,728 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 37 treesize of output 34 [2021-08-06 14:33:02,839 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:02,840 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 41 treesize of output 38 [2021-08-06 14:33:02,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:33:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:33:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:03,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677429694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:03,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:03,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:33:03,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102999192] [2021-08-06 14:33:03,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:33:03,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:03,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:33:03,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:03,190 INFO L87 Difference]: Start difference. First operand 919 states and 2945 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:03,867 INFO L93 Difference]: Finished difference Result 1394 states and 4290 transitions. [2021-08-06 14:33:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:33:03,867 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:03,870 INFO L225 Difference]: With dead ends: 1394 [2021-08-06 14:33:03,870 INFO L226 Difference]: Without dead ends: 1314 [2021-08-06 14:33:03,870 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 663.9ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-08-06 14:33:03,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-08-06 14:33:03,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 933. [2021-08-06 14:33:03,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 3.221030042918455) internal successors, (3002), 932 states have internal predecessors, (3002), 0 states have call successors, (0), 0 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 14:33:03,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 3002 transitions. [2021-08-06 14:33:03,882 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 3002 transitions. Word has length 24 [2021-08-06 14:33:03,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:03,882 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 3002 transitions. [2021-08-06 14:33:03,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:03,883 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 3002 transitions. [2021-08-06 14:33:03,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:03,884 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:03,884 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:03,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:04,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-08-06 14:33:04,084 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:04,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:04,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1453186027, now seen corresponding path program 125 times [2021-08-06 14:33:04,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:04,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948206197] [2021-08-06 14:33:04,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:04,085 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:04,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948206197] [2021-08-06 14:33:04,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948206197] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:04,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391728053] [2021-08-06 14:33:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:04,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:04,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:04,405 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:04,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-08-06 14:33:09,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:33:09,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:09,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:09,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:09,262 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:09,262 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 37 treesize of output 34 [2021-08-06 14:33:09,340 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:09,340 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 41 treesize of output 38 [2021-08-06 14:33:09,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:33:09,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:33:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:09,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391728053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:09,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:09,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:33:09,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714024843] [2021-08-06 14:33:09,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:33:09,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:09,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:33:09,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:09,614 INFO L87 Difference]: Start difference. First operand 933 states and 3002 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:10,400 INFO L93 Difference]: Finished difference Result 1373 states and 4149 transitions. [2021-08-06 14:33:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:33:10,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:10,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:10,402 INFO L225 Difference]: With dead ends: 1373 [2021-08-06 14:33:10,402 INFO L226 Difference]: Without dead ends: 1315 [2021-08-06 14:33:10,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 760.4ms TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:33:10,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2021-08-06 14:33:10,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 938. [2021-08-06 14:33:10,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.225186766275347) internal successors, (3022), 937 states have internal predecessors, (3022), 0 states have call successors, (0), 0 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 14:33:10,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 3022 transitions. [2021-08-06 14:33:10,415 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 3022 transitions. Word has length 24 [2021-08-06 14:33:10,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:10,415 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 3022 transitions. [2021-08-06 14:33:10,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:10,415 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 3022 transitions. [2021-08-06 14:33:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:10,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:10,416 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:10,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-08-06 14:33:10,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:10,617 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash -409953255, now seen corresponding path program 126 times [2021-08-06 14:33:10,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:10,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884354743] [2021-08-06 14:33:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:10,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:10,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:10,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884354743] [2021-08-06 14:33:10,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884354743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:10,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051166894] [2021-08-06 14:33:10,849 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:10,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:10,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:10,849 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:10,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-08-06 14:33:15,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:33:15,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:15,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:15,710 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:15,710 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 37 treesize of output 34 [2021-08-06 14:33:15,866 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:15,866 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 24 [2021-08-06 14:33:15,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-06 14:33:16,115 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051166894] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:16,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:16,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:33:16,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234431688] [2021-08-06 14:33:16,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:33:16,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:16,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:33:16,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:16,116 INFO L87 Difference]: Start difference. First operand 938 states and 3022 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:33:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:16,820 INFO L93 Difference]: Finished difference Result 1402 states and 4323 transitions. [2021-08-06 14:33:16,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:33:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 14:33:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:16,822 INFO L225 Difference]: With dead ends: 1402 [2021-08-06 14:33:16,822 INFO L226 Difference]: Without dead ends: 1290 [2021-08-06 14:33:16,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 574.6ms TimeCoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:33:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2021-08-06 14:33:16,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 942. [2021-08-06 14:33:16,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 3.2316684378320937) internal successors, (3041), 941 states have internal predecessors, (3041), 0 states have call successors, (0), 0 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 14:33:16,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 3041 transitions. [2021-08-06 14:33:16,835 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 3041 transitions. Word has length 24 [2021-08-06 14:33:16,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:16,835 INFO L470 AbstractCegarLoop]: Abstraction has 942 states and 3041 transitions. [2021-08-06 14:33:16,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:33:16,835 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 3041 transitions. [2021-08-06 14:33:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:16,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:16,836 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:16,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2021-08-06 14:33:17,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:17,038 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:17,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:17,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1348842219, now seen corresponding path program 127 times [2021-08-06 14:33:17,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:17,038 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977345023] [2021-08-06 14:33:17,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:17,039 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:17,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:17,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977345023] [2021-08-06 14:33:17,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977345023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:17,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985982761] [2021-08-06 14:33:17,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:17,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:17,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:17,289 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:17,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-08-06 14:33:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:22,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:22,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:33:22,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:33:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:22,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985982761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:22,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:22,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:33:22,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66337737] [2021-08-06 14:33:22,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:33:22,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:22,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:33:22,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:22,561 INFO L87 Difference]: Start difference. First operand 942 states and 3041 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:23,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:23,075 INFO L93 Difference]: Finished difference Result 1428 states and 4387 transitions. [2021-08-06 14:33:23,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:33:23,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:23,077 INFO L225 Difference]: With dead ends: 1428 [2021-08-06 14:33:23,077 INFO L226 Difference]: Without dead ends: 1308 [2021-08-06 14:33:23,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:33:23,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-08-06 14:33:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 963. [2021-08-06 14:33:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 3.1995841995841996) internal successors, (3078), 962 states have internal predecessors, (3078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 3078 transitions. [2021-08-06 14:33:23,090 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 3078 transitions. Word has length 24 [2021-08-06 14:33:23,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:23,090 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 3078 transitions. [2021-08-06 14:33:23,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:23,090 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 3078 transitions. [2021-08-06 14:33:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:23,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:23,091 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:23,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-08-06 14:33:23,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:23,292 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1866432867, now seen corresponding path program 128 times [2021-08-06 14:33:23,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:23,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482748573] [2021-08-06 14:33:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:23,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:23,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:23,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482748573] [2021-08-06 14:33:23,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482748573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:23,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384039912] [2021-08-06 14:33:23,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:33:23,550 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:23,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:23,551 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:23,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2021-08-06 14:33:28,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:33:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:28,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:28,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-08-06 14:33:28,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:33:28,802 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:28,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384039912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:28,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:28,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:33:28,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309837306] [2021-08-06 14:33:28,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:33:28,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:33:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:28,803 INFO L87 Difference]: Start difference. First operand 963 states and 3078 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:29,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:29,468 INFO L93 Difference]: Finished difference Result 1429 states and 4378 transitions. [2021-08-06 14:33:29,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:33:29,468 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:29,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:29,470 INFO L225 Difference]: With dead ends: 1429 [2021-08-06 14:33:29,470 INFO L226 Difference]: Without dead ends: 1313 [2021-08-06 14:33:29,470 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 621.6ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:33:29,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-08-06 14:33:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 946. [2021-08-06 14:33:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 945 states have (on average 3.184126984126984) internal successors, (3009), 945 states have internal predecessors, (3009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:29,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 3009 transitions. [2021-08-06 14:33:29,482 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 3009 transitions. Word has length 24 [2021-08-06 14:33:29,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:29,482 INFO L470 AbstractCegarLoop]: Abstraction has 946 states and 3009 transitions. [2021-08-06 14:33:29,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 3009 transitions. [2021-08-06 14:33:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:29,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:29,483 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:29,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2021-08-06 14:33:29,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:29,693 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1015768551, now seen corresponding path program 129 times [2021-08-06 14:33:29,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:29,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104574590] [2021-08-06 14:33:29,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:29,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:29,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:29,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:29,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:29,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104574590] [2021-08-06 14:33:29,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104574590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:29,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485094961] [2021-08-06 14:33:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:33:29,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:29,888 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:29,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2021-08-06 14:33:34,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:33:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:34,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:34,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:34,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-08-06 14:33:34,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:33:34,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:33:34,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:34,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485094961] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:34,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:34,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:33:34,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141055849] [2021-08-06 14:33:34,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:33:34,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:34,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:33:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:33:34,978 INFO L87 Difference]: Start difference. First operand 946 states and 3009 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:35,605 INFO L93 Difference]: Finished difference Result 1802 states and 5479 transitions. [2021-08-06 14:33:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:33:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:35,609 INFO L225 Difference]: With dead ends: 1802 [2021-08-06 14:33:35,609 INFO L226 Difference]: Without dead ends: 1635 [2021-08-06 14:33:35,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 522.5ms TimeCoverageRelationStatistics Valid=153, Invalid=549, Unknown=0, NotChecked=0, Total=702 [2021-08-06 14:33:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-08-06 14:33:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 996. [2021-08-06 14:33:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 3.2190954773869347) internal successors, (3203), 995 states have internal predecessors, (3203), 0 states have call successors, (0), 0 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 14:33:35,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 3203 transitions. [2021-08-06 14:33:35,624 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 3203 transitions. Word has length 24 [2021-08-06 14:33:35,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:35,624 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 3203 transitions. [2021-08-06 14:33:35,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:35,624 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 3203 transitions. [2021-08-06 14:33:35,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:35,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:35,625 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:35,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2021-08-06 14:33:35,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-08-06 14:33:35,830 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:35,831 INFO L82 PathProgramCache]: Analyzing trace with hash -414136377, now seen corresponding path program 130 times [2021-08-06 14:33:35,831 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:35,831 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030022048] [2021-08-06 14:33:35,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:35,831 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:35,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:36,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:36,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030022048] [2021-08-06 14:33:36,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030022048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:36,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740241755] [2021-08-06 14:33:36,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:33:36,148 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:36,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:36,148 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:36,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2021-08-06 14:33:40,969 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:33:40,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:40,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:33:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:41,125 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:41,126 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 37 treesize of output 34 [2021-08-06 14:33:41,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-08-06 14:33:41,325 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:41,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 33 [2021-08-06 14:33:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:41,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740241755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:41,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:41,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:33:41,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11687849] [2021-08-06 14:33:41,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:33:41,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:41,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:33:41,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:41,680 INFO L87 Difference]: Start difference. First operand 996 states and 3203 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:42,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:42,848 INFO L93 Difference]: Finished difference Result 1677 states and 5161 transitions. [2021-08-06 14:33:42,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 14:33:42,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:42,851 INFO L225 Difference]: With dead ends: 1677 [2021-08-06 14:33:42,851 INFO L226 Difference]: Without dead ends: 1597 [2021-08-06 14:33:42,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1088.2ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-08-06 14:33:42,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-08-06 14:33:42,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1024. [2021-08-06 14:33:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 3.2375366568914954) internal successors, (3312), 1023 states have internal predecessors, (3312), 0 states have call successors, (0), 0 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 14:33:42,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3312 transitions. [2021-08-06 14:33:42,865 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3312 transitions. Word has length 24 [2021-08-06 14:33:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:42,866 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 3312 transitions. [2021-08-06 14:33:42,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:42,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3312 transitions. [2021-08-06 14:33:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:42,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:42,867 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:42,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:43,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-08-06 14:33:43,067 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:43,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1858982831, now seen corresponding path program 131 times [2021-08-06 14:33:43,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:43,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90541788] [2021-08-06 14:33:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:43,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:43,389 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:43,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:43,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90541788] [2021-08-06 14:33:43,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90541788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:43,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795834840] [2021-08-06 14:33:43,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:33:43,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:43,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:43,390 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:43,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2021-08-06 14:33:48,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:33:48,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:48,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:48,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:48,456 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:48,456 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 37 treesize of output 34 [2021-08-06 14:33:48,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2021-08-06 14:33:48,601 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:48,601 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 38 treesize of output 33 [2021-08-06 14:33:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:48,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795834840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:48,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:48,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:33:48,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562835446] [2021-08-06 14:33:48,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:33:48,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:48,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:33:48,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:48,860 INFO L87 Difference]: Start difference. First operand 1024 states and 3312 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:50,947 INFO L93 Difference]: Finished difference Result 1899 states and 5661 transitions. [2021-08-06 14:33:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 14:33:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:50,951 INFO L225 Difference]: With dead ends: 1899 [2021-08-06 14:33:50,951 INFO L226 Difference]: Without dead ends: 1806 [2021-08-06 14:33:50,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1906.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 14:33:50,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2021-08-06 14:33:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1046. [2021-08-06 14:33:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.2698564593301436) internal successors, (3417), 1045 states have internal predecessors, (3417), 0 states have call successors, (0), 0 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 14:33:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3417 transitions. [2021-08-06 14:33:50,967 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3417 transitions. Word has length 24 [2021-08-06 14:33:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:50,967 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3417 transitions. [2021-08-06 14:33:50,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3417 transitions. [2021-08-06 14:33:50,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:50,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:50,968 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:50,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2021-08-06 14:33:51,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-08-06 14:33:51,169 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -4156451, now seen corresponding path program 132 times [2021-08-06 14:33:51,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:51,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813477630] [2021-08-06 14:33:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:51,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:51,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:51,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:51,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813477630] [2021-08-06 14:33:51,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813477630] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:51,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687212954] [2021-08-06 14:33:51,463 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:33:51,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:51,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:51,464 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:51,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2021-08-06 14:33:56,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:33:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:33:56,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:33:56,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:33:56,644 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:56,644 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 37 treesize of output 34 [2021-08-06 14:33:56,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-06 14:33:56,893 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:33:56,893 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 19 treesize of output 18 [2021-08-06 14:33:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:57,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687212954] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:57,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:33:57,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 14:33:57,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680282091] [2021-08-06 14:33:57,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 14:33:57,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:33:57,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 14:33:57,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:33:57,091 INFO L87 Difference]: Start difference. First operand 1046 states and 3417 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:33:57,943 INFO L93 Difference]: Finished difference Result 1727 states and 5388 transitions. [2021-08-06 14:33:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:33:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:33:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:33:57,946 INFO L225 Difference]: With dead ends: 1727 [2021-08-06 14:33:57,946 INFO L226 Difference]: Without dead ends: 1638 [2021-08-06 14:33:57,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 817.6ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-08-06 14:33:57,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-08-06 14:33:57,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1050. [2021-08-06 14:33:57,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1049 states have (on average 3.275500476644423) internal successors, (3436), 1049 states have internal predecessors, (3436), 0 states have call successors, (0), 0 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 14:33:57,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 3436 transitions. [2021-08-06 14:33:57,961 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 3436 transitions. Word has length 24 [2021-08-06 14:33:57,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:33:57,961 INFO L470 AbstractCegarLoop]: Abstraction has 1050 states and 3436 transitions. [2021-08-06 14:33:57,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:33:57,961 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 3436 transitions. [2021-08-06 14:33:57,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:33:57,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:33:57,962 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:33:57,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2021-08-06 14:33:58,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-08-06 14:33:58,177 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:33:58,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:33:58,177 INFO L82 PathProgramCache]: Analyzing trace with hash -166161681, now seen corresponding path program 133 times [2021-08-06 14:33:58,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:33:58,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681062705] [2021-08-06 14:33:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:33:58,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:33:58,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:33:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:33:58,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:33:58,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681062705] [2021-08-06 14:33:58,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681062705] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:33:58,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106395209] [2021-08-06 14:33:58,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:33:58,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:33:58,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:33:58,430 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:33:58,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2021-08-06 14:34:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:03,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:03,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:03,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:03,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:34:03,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:34:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106395209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:03,846 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:03,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544029216] [2021-08-06 14:34:03,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:03,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:03,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:03,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:03,846 INFO L87 Difference]: Start difference. First operand 1050 states and 3436 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:34:04,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:04,571 INFO L93 Difference]: Finished difference Result 1991 states and 6297 transitions. [2021-08-06 14:34:04,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:34:04,571 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 14:34:04,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:04,574 INFO L225 Difference]: With dead ends: 1991 [2021-08-06 14:34:04,574 INFO L226 Difference]: Without dead ends: 1929 [2021-08-06 14:34:04,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 614.0ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-06 14:34:04,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1929 states. [2021-08-06 14:34:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1929 to 1041. [2021-08-06 14:34:04,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1041 states, 1040 states have (on average 3.2615384615384615) internal successors, (3392), 1040 states have internal predecessors, (3392), 0 states have call successors, (0), 0 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 14:34:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1041 states to 1041 states and 3392 transitions. [2021-08-06 14:34:04,590 INFO L78 Accepts]: Start accepts. Automaton has 1041 states and 3392 transitions. Word has length 24 [2021-08-06 14:34:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:04,590 INFO L470 AbstractCegarLoop]: Abstraction has 1041 states and 3392 transitions. [2021-08-06 14:34:04,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 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 14:34:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1041 states and 3392 transitions. [2021-08-06 14:34:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:04,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:04,592 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:04,623 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2021-08-06 14:34:04,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:04,813 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1680695765, now seen corresponding path program 134 times [2021-08-06 14:34:04,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:04,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240528284] [2021-08-06 14:34:04,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:04,814 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:05,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:05,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:05,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240528284] [2021-08-06 14:34:05,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240528284] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:05,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308056202] [2021-08-06 14:34:05,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:05,046 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:05,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:05,046 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:05,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2021-08-06 14:34:10,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:10,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:10,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:34:10,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:10,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:10,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:34:10,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:34:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:10,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308056202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:10,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:10,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:34:10,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876710351] [2021-08-06 14:34:10,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:10,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:10,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:10,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:10,413 INFO L87 Difference]: Start difference. First operand 1041 states and 3392 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:10,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:10,567 INFO L93 Difference]: Finished difference Result 1112 states and 3557 transitions. [2021-08-06 14:34:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:34:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:10,569 INFO L225 Difference]: With dead ends: 1112 [2021-08-06 14:34:10,569 INFO L226 Difference]: Without dead ends: 1053 [2021-08-06 14:34:10,569 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:10,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2021-08-06 14:34:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1045. [2021-08-06 14:34:10,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.2614942528735633) internal successors, (3405), 1044 states have internal predecessors, (3405), 0 states have call successors, (0), 0 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 14:34:10,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3405 transitions. [2021-08-06 14:34:10,580 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3405 transitions. Word has length 24 [2021-08-06 14:34:10,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:10,581 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3405 transitions. [2021-08-06 14:34:10,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:10,581 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3405 transitions. [2021-08-06 14:34:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:10,582 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:10,582 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:10,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Ended with exit code 0 [2021-08-06 14:34:10,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-08-06 14:34:10,782 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:10,783 INFO L82 PathProgramCache]: Analyzing trace with hash -516762591, now seen corresponding path program 135 times [2021-08-06 14:34:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:10,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035041562] [2021-08-06 14:34:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:10,783 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:10,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:10,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035041562] [2021-08-06 14:34:10,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035041562] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:10,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788879468] [2021-08-06 14:34:10,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:10,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:10,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:10,977 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:11,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2021-08-06 14:34:15,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:34:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:15,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:16,158 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:16,158 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 37 treesize of output 34 [2021-08-06 14:34:16,251 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:16,252 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 52 treesize of output 49 [2021-08-06 14:34:16,258 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:16,258 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 41 treesize of output 36 [2021-08-06 14:34:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:16,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788879468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:16,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:16,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:34:16,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456299573] [2021-08-06 14:34:16,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:34:16,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:16,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:34:16,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:34:16,459 INFO L87 Difference]: Start difference. First operand 1045 states and 3405 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:16,682 INFO L93 Difference]: Finished difference Result 1104 states and 3549 transitions. [2021-08-06 14:34:16,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:16,683 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:34:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:16,684 INFO L225 Difference]: With dead ends: 1104 [2021-08-06 14:34:16,684 INFO L226 Difference]: Without dead ends: 1069 [2021-08-06 14:34:16,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 215.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-08-06 14:34:16,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1047. [2021-08-06 14:34:16,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.260038240917782) internal successors, (3410), 1046 states have internal predecessors, (3410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3410 transitions. [2021-08-06 14:34:16,696 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3410 transitions. Word has length 24 [2021-08-06 14:34:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:16,696 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3410 transitions. [2021-08-06 14:34:16,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:16,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3410 transitions. [2021-08-06 14:34:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:16,697 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:16,697 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:16,729 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2021-08-06 14:34:16,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:16,898 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash 958854987, now seen corresponding path program 136 times [2021-08-06 14:34:16,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:16,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210199354] [2021-08-06 14:34:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:16,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:16,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:17,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:17,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210199354] [2021-08-06 14:34:17,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210199354] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:17,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728334305] [2021-08-06 14:34:17,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:17,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:17,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:17,128 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:17,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2021-08-06 14:34:22,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:34:22,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:22,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:22,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:22,374 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:22,375 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 38 treesize of output 35 [2021-08-06 14:34:22,445 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:22,445 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 60 treesize of output 55 [2021-08-06 14:34:22,451 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:22,451 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 56 treesize of output 47 [2021-08-06 14:34:22,691 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:22,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728334305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:22,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:22,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:34:22,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247747113] [2021-08-06 14:34:22,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:34:22,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:22,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:34:22,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:34:22,692 INFO L87 Difference]: Start difference. First operand 1047 states and 3410 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:22,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:22,937 INFO L93 Difference]: Finished difference Result 1108 states and 3561 transitions. [2021-08-06 14:34:22,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:22,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:34:22,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:22,939 INFO L225 Difference]: With dead ends: 1108 [2021-08-06 14:34:22,939 INFO L226 Difference]: Without dead ends: 1069 [2021-08-06 14:34:22,939 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 228.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:22,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-08-06 14:34:22,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1045. [2021-08-06 14:34:22,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1045 states, 1044 states have (on average 3.2614942528735633) internal successors, (3405), 1044 states have internal predecessors, (3405), 0 states have call successors, (0), 0 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 14:34:22,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1045 states to 1045 states and 3405 transitions. [2021-08-06 14:34:22,951 INFO L78 Accepts]: Start accepts. Automaton has 1045 states and 3405 transitions. Word has length 24 [2021-08-06 14:34:22,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:22,951 INFO L470 AbstractCegarLoop]: Abstraction has 1045 states and 3405 transitions. [2021-08-06 14:34:22,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:22,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1045 states and 3405 transitions. [2021-08-06 14:34:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:22,952 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:22,952 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:22,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:23,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:23,177 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:23,177 INFO L82 PathProgramCache]: Analyzing trace with hash -705554193, now seen corresponding path program 137 times [2021-08-06 14:34:23,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:23,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423289275] [2021-08-06 14:34:23,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:23,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:23,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:23,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423289275] [2021-08-06 14:34:23,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423289275] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:23,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261573399] [2021-08-06 14:34:23,422 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:34:23,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:23,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:23,423 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:23,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2021-08-06 14:34:28,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 14:34:28,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:28,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:28,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:28,569 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:28,570 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 37 treesize of output 34 [2021-08-06 14:34:28,923 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:28,924 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 36 treesize of output 35 [2021-08-06 14:34:28,940 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:28,940 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 30 treesize of output 29 [2021-08-06 14:34:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:29,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261573399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:29,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:29,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:29,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428742020] [2021-08-06 14:34:29,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:29,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:29,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:29,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:29,024 INFO L87 Difference]: Start difference. First operand 1045 states and 3405 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:34:29,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:29,587 INFO L93 Difference]: Finished difference Result 1209 states and 3838 transitions. [2021-08-06 14:34:29,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:34:29,588 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:34:29,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:29,590 INFO L225 Difference]: With dead ends: 1209 [2021-08-06 14:34:29,590 INFO L226 Difference]: Without dead ends: 1123 [2021-08-06 14:34:29,590 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 532.8ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:34:29,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2021-08-06 14:34:29,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1058. [2021-08-06 14:34:29,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.262062440870388) internal successors, (3448), 1057 states have internal predecessors, (3448), 0 states have call successors, (0), 0 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 14:34:29,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3448 transitions. [2021-08-06 14:34:29,601 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3448 transitions. Word has length 24 [2021-08-06 14:34:29,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:29,601 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3448 transitions. [2021-08-06 14:34:29,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:34:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3448 transitions. [2021-08-06 14:34:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:29,603 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:29,603 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:29,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2021-08-06 14:34:29,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:29,803 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:29,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:29,804 INFO L82 PathProgramCache]: Analyzing trace with hash 458378981, now seen corresponding path program 138 times [2021-08-06 14:34:29,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:29,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221799289] [2021-08-06 14:34:29,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:29,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:30,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:30,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221799289] [2021-08-06 14:34:30,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221799289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:30,026 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950683079] [2021-08-06 14:34:30,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:34:30,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:30,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:30,027 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:30,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2021-08-06 14:34:35,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:34:35,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:35,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:35,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:35,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:35,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-08-06 14:34:35,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:34:35,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:34:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:35,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950683079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:35,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:35,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:34:35,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417326428] [2021-08-06 14:34:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:35,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:35,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:35,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:35,556 INFO L87 Difference]: Start difference. First operand 1058 states and 3448 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:35,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:35,776 INFO L93 Difference]: Finished difference Result 1345 states and 4216 transitions. [2021-08-06 14:34:35,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:34:35,776 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:34:35,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:35,778 INFO L225 Difference]: With dead ends: 1345 [2021-08-06 14:34:35,778 INFO L226 Difference]: Without dead ends: 1283 [2021-08-06 14:34:35,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 279.8ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:34:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-08-06 14:34:35,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 1058. [2021-08-06 14:34:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 3.262062440870388) internal successors, (3448), 1057 states have internal predecessors, (3448), 0 states have call successors, (0), 0 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 14:34:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3448 transitions. [2021-08-06 14:34:35,791 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3448 transitions. Word has length 24 [2021-08-06 14:34:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:35,791 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3448 transitions. [2021-08-06 14:34:35,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:35,791 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3448 transitions. [2021-08-06 14:34:35,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:35,793 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:35,793 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:35,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Ended with exit code 0 [2021-08-06 14:34:35,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:35,993 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:35,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:35,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1941758741, now seen corresponding path program 139 times [2021-08-06 14:34:35,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:35,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002225922] [2021-08-06 14:34:35,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:35,994 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:36,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:36,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:36,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:36,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002225922] [2021-08-06 14:34:36,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002225922] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:36,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502439709] [2021-08-06 14:34:36,235 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:34:36,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:36,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:36,235 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:36,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2021-08-06 14:34:41,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:41,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:41,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:41,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2021-08-06 14:34:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:41,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502439709] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:41,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:41,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:34:41,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133662037] [2021-08-06 14:34:41,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:34:41,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:41,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:34:41,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:34:41,914 INFO L87 Difference]: Start difference. First operand 1058 states and 3448 transitions. Second operand has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 14:34:42,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:42,222 INFO L93 Difference]: Finished difference Result 1166 states and 3748 transitions. [2021-08-06 14:34:42,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 14:34:42,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 24 [2021-08-06 14:34:42,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:42,225 INFO L225 Difference]: With dead ends: 1166 [2021-08-06 14:34:42,225 INFO L226 Difference]: Without dead ends: 1135 [2021-08-06 14:34:42,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 267.6ms TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:42,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2021-08-06 14:34:42,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1053. [2021-08-06 14:34:42,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 3.267110266159696) internal successors, (3437), 1052 states have internal predecessors, (3437), 0 states have call successors, (0), 0 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 14:34:42,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 3437 transitions. [2021-08-06 14:34:42,237 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 3437 transitions. Word has length 24 [2021-08-06 14:34:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:42,237 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 3437 transitions. [2021-08-06 14:34:42,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.25) internal successors, (36), 16 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 14:34:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 3437 transitions. [2021-08-06 14:34:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:42,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:42,238 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:42,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2021-08-06 14:34:42,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2021-08-06 14:34:42,439 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:42,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:42,439 INFO L82 PathProgramCache]: Analyzing trace with hash -616234577, now seen corresponding path program 140 times [2021-08-06 14:34:42,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:42,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153184578] [2021-08-06 14:34:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:42,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:42,663 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:42,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153184578] [2021-08-06 14:34:42,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153184578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:42,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701746547] [2021-08-06 14:34:42,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:34:42,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:42,664 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:42,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2021-08-06 14:34:47,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:34:47,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:47,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:47,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:47,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:34:48,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:34:48,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:34:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:48,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701746547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:48,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:48,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:34:48,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030826477] [2021-08-06 14:34:48,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:34:48,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:34:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:34:48,247 INFO L87 Difference]: Start difference. First operand 1053 states and 3437 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:48,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:48,458 INFO L93 Difference]: Finished difference Result 1156 states and 3723 transitions. [2021-08-06 14:34:48,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:34:48,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:34:48,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:48,461 INFO L225 Difference]: With dead ends: 1156 [2021-08-06 14:34:48,461 INFO L226 Difference]: Without dead ends: 1125 [2021-08-06 14:34:48,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-08-06 14:34:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1046. [2021-08-06 14:34:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.262200956937799) internal successors, (3409), 1045 states have internal predecessors, (3409), 0 states have call successors, (0), 0 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 14:34:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3409 transitions. [2021-08-06 14:34:48,472 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3409 transitions. Word has length 24 [2021-08-06 14:34:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:48,472 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3409 transitions. [2021-08-06 14:34:48,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:34:48,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3409 transitions. [2021-08-06 14:34:48,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:48,474 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:48,474 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:48,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:48,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-08-06 14:34:48,708 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:48,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:48,709 INFO L82 PathProgramCache]: Analyzing trace with hash 742052065, now seen corresponding path program 141 times [2021-08-06 14:34:48,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:48,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393896490] [2021-08-06 14:34:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:48,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:49,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:49,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393896490] [2021-08-06 14:34:49,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393896490] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:49,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752530122] [2021-08-06 14:34:49,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:34:49,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:49,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:49,008 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:49,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2021-08-06 14:34:54,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:34:54,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:34:54,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:34:54,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:34:54,614 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:54,614 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 37 treesize of output 34 [2021-08-06 14:34:54,704 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:54,704 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 52 treesize of output 49 [2021-08-06 14:34:54,711 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:34:54,711 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 41 treesize of output 36 [2021-08-06 14:34:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:55,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752530122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:55,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:34:55,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:34:55,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400062298] [2021-08-06 14:34:55,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:34:55,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:34:55,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:34:55,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:34:55,082 INFO L87 Difference]: Start difference. First operand 1046 states and 3409 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:34:55,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:34:55,638 INFO L93 Difference]: Finished difference Result 1390 states and 4298 transitions. [2021-08-06 14:34:55,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:34:55,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:34:55,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:34:55,640 INFO L225 Difference]: With dead ends: 1390 [2021-08-06 14:34:55,640 INFO L226 Difference]: Without dead ends: 1297 [2021-08-06 14:34:55,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:34:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2021-08-06 14:34:55,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1049. [2021-08-06 14:34:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.2624045801526718) internal successors, (3419), 1048 states have internal predecessors, (3419), 0 states have call successors, (0), 0 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 14:34:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3419 transitions. [2021-08-06 14:34:55,653 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3419 transitions. Word has length 24 [2021-08-06 14:34:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:34:55,654 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3419 transitions. [2021-08-06 14:34:55,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:34:55,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3419 transitions. [2021-08-06 14:34:55,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:34:55,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:34:55,655 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:34:55,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2021-08-06 14:34:55,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:55,865 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:34:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:34:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash 169127301, now seen corresponding path program 142 times [2021-08-06 14:34:55,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:34:55,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034611078] [2021-08-06 14:34:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:34:55,865 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:34:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:34:56,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:34:56,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:34:56,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034611078] [2021-08-06 14:34:56,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034611078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:34:56,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768859008] [2021-08-06 14:34:56,173 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:34:56,173 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:34:56,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:34:56,173 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:34:56,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2021-08-06 14:35:01,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:01,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:01,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:01,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:01,618 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:01,618 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 37 treesize of output 34 [2021-08-06 14:35:01,720 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:01,721 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 52 treesize of output 49 [2021-08-06 14:35:01,727 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:01,727 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 49 treesize of output 44 [2021-08-06 14:35:01,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:01,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768859008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:01,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:01,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:35:01,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959448086] [2021-08-06 14:35:01,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:35:01,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:01,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:35:01,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:01,958 INFO L87 Difference]: Start difference. First operand 1049 states and 3419 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:02,345 INFO L93 Difference]: Finished difference Result 1252 states and 3997 transitions. [2021-08-06 14:35:02,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:35:02,345 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:35:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:02,347 INFO L225 Difference]: With dead ends: 1252 [2021-08-06 14:35:02,347 INFO L226 Difference]: Without dead ends: 1221 [2021-08-06 14:35:02,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:35:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2021-08-06 14:35:02,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1046. [2021-08-06 14:35:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.262200956937799) internal successors, (3409), 1045 states have internal predecessors, (3409), 0 states have call successors, (0), 0 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 14:35:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3409 transitions. [2021-08-06 14:35:02,368 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3409 transitions. Word has length 24 [2021-08-06 14:35:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:02,368 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3409 transitions. [2021-08-06 14:35:02,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3409 transitions. [2021-08-06 14:35:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:02,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:02,370 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:02,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:02,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-08-06 14:35:02,574 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:02,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:02,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1162785999, now seen corresponding path program 143 times [2021-08-06 14:35:02,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:02,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571048651] [2021-08-06 14:35:02,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:02,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:02,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:02,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571048651] [2021-08-06 14:35:02,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571048651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:02,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728712017] [2021-08-06 14:35:02,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:02,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:02,975 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:02,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2021-08-06 14:35:08,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:35:08,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:08,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:08,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:08,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:35:08,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2021-08-06 14:35:08,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-06 14:35:08,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:35:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:08,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728712017] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:08,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:08,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:35:08,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665382071] [2021-08-06 14:35:08,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:08,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:08,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:08,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:08,969 INFO L87 Difference]: Start difference. First operand 1046 states and 3409 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:09,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:09,358 INFO L93 Difference]: Finished difference Result 1170 states and 3773 transitions. [2021-08-06 14:35:09,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 14:35:09,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:35:09,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:09,360 INFO L225 Difference]: With dead ends: 1170 [2021-08-06 14:35:09,360 INFO L226 Difference]: Without dead ends: 1131 [2021-08-06 14:35:09,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 413.8ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:35:09,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-08-06 14:35:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1049. [2021-08-06 14:35:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.2624045801526718) internal successors, (3419), 1048 states have internal predecessors, (3419), 0 states have call successors, (0), 0 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 14:35:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3419 transitions. [2021-08-06 14:35:09,372 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3419 transitions. Word has length 24 [2021-08-06 14:35:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:09,372 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3419 transitions. [2021-08-06 14:35:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3419 transitions. [2021-08-06 14:35:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:09,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:09,373 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:09,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2021-08-06 14:35:09,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-08-06 14:35:09,577 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:09,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:09,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1471336843, now seen corresponding path program 144 times [2021-08-06 14:35:09,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:09,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740305013] [2021-08-06 14:35:09,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:09,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:09,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:09,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:09,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740305013] [2021-08-06 14:35:09,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740305013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:09,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825348580] [2021-08-06 14:35:09,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:09,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:09,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:09,921 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:09,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2021-08-06 14:35:15,345 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 14:35:15,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:15,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:15,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:15,472 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:15,473 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 30 treesize of output 29 [2021-08-06 14:35:15,557 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:15,558 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 50 treesize of output 47 [2021-08-06 14:35:15,564 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:15,564 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 41 treesize of output 36 [2021-08-06 14:35:15,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:15,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825348580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:15,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:15,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:35:15,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110414872] [2021-08-06 14:35:15,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:35:15,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:15,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:35:15,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:15,943 INFO L87 Difference]: Start difference. First operand 1049 states and 3419 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:16,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:16,561 INFO L93 Difference]: Finished difference Result 1310 states and 4075 transitions. [2021-08-06 14:35:16,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:35:16,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:35:16,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:16,563 INFO L225 Difference]: With dead ends: 1310 [2021-08-06 14:35:16,563 INFO L226 Difference]: Without dead ends: 1217 [2021-08-06 14:35:16,564 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:35:16,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-08-06 14:35:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1052. [2021-08-06 14:35:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 3.262607040913416) internal successors, (3429), 1051 states have internal predecessors, (3429), 0 states have call successors, (0), 0 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 14:35:16,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3429 transitions. [2021-08-06 14:35:16,576 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3429 transitions. Word has length 24 [2021-08-06 14:35:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:16,576 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3429 transitions. [2021-08-06 14:35:16,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3429 transitions. [2021-08-06 14:35:16,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:16,578 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:16,578 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:16,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Ended with exit code 0 [2021-08-06 14:35:16,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-08-06 14:35:16,778 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:16,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:16,778 INFO L82 PathProgramCache]: Analyzing trace with hash 898412079, now seen corresponding path program 145 times [2021-08-06 14:35:16,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:16,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214248536] [2021-08-06 14:35:16,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:16,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:16,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:17,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214248536] [2021-08-06 14:35:17,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214248536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:17,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702854603] [2021-08-06 14:35:17,157 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:17,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:17,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:17,158 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:17,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2021-08-06 14:35:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:22,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:35:22,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:22,712 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:22,712 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 30 treesize of output 29 [2021-08-06 14:35:22,835 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:22,836 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 50 treesize of output 47 [2021-08-06 14:35:22,843 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:22,843 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 41 treesize of output 36 [2021-08-06 14:35:23,188 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:23,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702854603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:23,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:23,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:35:23,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162691213] [2021-08-06 14:35:23,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:23,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:23,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:23,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:23,189 INFO L87 Difference]: Start difference. First operand 1052 states and 3429 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:35:23,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:23,811 INFO L93 Difference]: Finished difference Result 1471 states and 4553 transitions. [2021-08-06 14:35:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:35:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have 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 14:35:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:23,814 INFO L225 Difference]: With dead ends: 1471 [2021-08-06 14:35:23,814 INFO L226 Difference]: Without dead ends: 1337 [2021-08-06 14:35:23,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 604.9ms TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-08-06 14:35:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2021-08-06 14:35:23,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1049. [2021-08-06 14:35:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 1048 states have (on average 3.267175572519084) internal successors, (3424), 1048 states have internal predecessors, (3424), 0 states have call successors, (0), 0 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 14:35:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 3424 transitions. [2021-08-06 14:35:23,828 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 3424 transitions. Word has length 24 [2021-08-06 14:35:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:23,828 INFO L470 AbstractCegarLoop]: Abstraction has 1049 states and 3424 transitions. [2021-08-06 14:35:23,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 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 14:35:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 3424 transitions. [2021-08-06 14:35:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:23,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:23,830 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:23,861 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2021-08-06 14:35:24,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:24,030 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:24,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:24,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1026952223, now seen corresponding path program 146 times [2021-08-06 14:35:24,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:24,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962297096] [2021-08-06 14:35:24,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:24,031 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:24,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:24,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:24,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962297096] [2021-08-06 14:35:24,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962297096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:24,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623191333] [2021-08-06 14:35:24,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:35:24,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:24,306 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:24,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2021-08-06 14:35:29,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:35:29,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:29,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:35:29,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:29,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:35:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:35:30,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:35:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:30,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623191333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:30,258 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:35:30,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886544198] [2021-08-06 14:35:30,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:30,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:30,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:30,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:30,258 INFO L87 Difference]: Start difference. First operand 1049 states and 3424 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:30,638 INFO L93 Difference]: Finished difference Result 1195 states and 3786 transitions. [2021-08-06 14:35:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:35:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:35:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:30,641 INFO L225 Difference]: With dead ends: 1195 [2021-08-06 14:35:30,641 INFO L226 Difference]: Without dead ends: 1109 [2021-08-06 14:35:30,641 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:35:30,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2021-08-06 14:35:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1067. [2021-08-06 14:35:30,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.2673545966228894) internal successors, (3483), 1066 states have internal predecessors, (3483), 0 states have call successors, (0), 0 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 14:35:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3483 transitions. [2021-08-06 14:35:30,653 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3483 transitions. Word has length 24 [2021-08-06 14:35:30,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:30,653 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3483 transitions. [2021-08-06 14:35:30,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:30,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3483 transitions. [2021-08-06 14:35:30,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:30,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:30,654 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:30,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:30,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:30,855 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:30,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:30,855 INFO L82 PathProgramCache]: Analyzing trace with hash 136980951, now seen corresponding path program 147 times [2021-08-06 14:35:30,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:30,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975971417] [2021-08-06 14:35:30,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:30,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:31,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:31,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975971417] [2021-08-06 14:35:31,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975971417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:31,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608966546] [2021-08-06 14:35:31,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:35:31,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:31,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:31,123 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:31,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2021-08-06 14:35:36,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:35:36,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:36,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:36,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:36,806 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:36,807 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 37 treesize of output 34 [2021-08-06 14:35:37,043 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:37,043 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 49 treesize of output 46 [2021-08-06 14:35:37,048 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:37,048 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 46 treesize of output 41 [2021-08-06 14:35:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:37,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608966546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:37,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:37,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 14:35:37,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71855653] [2021-08-06 14:35:37,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 14:35:37,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:37,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 14:35:37,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2021-08-06 14:35:37,363 INFO L87 Difference]: Start difference. First operand 1067 states and 3483 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:37,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:37,623 INFO L93 Difference]: Finished difference Result 1217 states and 3850 transitions. [2021-08-06 14:35:37,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:35:37,624 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:35:37,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:37,625 INFO L225 Difference]: With dead ends: 1217 [2021-08-06 14:35:37,625 INFO L226 Difference]: Without dead ends: 1170 [2021-08-06 14:35:37,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:37,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-08-06 14:35:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1063. [2021-08-06 14:35:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 3.274011299435028) internal successors, (3477), 1062 states have internal predecessors, (3477), 0 states have call successors, (0), 0 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 14:35:37,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3477 transitions. [2021-08-06 14:35:37,638 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3477 transitions. Word has length 24 [2021-08-06 14:35:37,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:37,638 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 3477 transitions. [2021-08-06 14:35:37,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:37,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3477 transitions. [2021-08-06 14:35:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:37,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:37,639 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:37,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:37,845 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:37,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:37,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1109722337, now seen corresponding path program 148 times [2021-08-06 14:35:37,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:37,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602162270] [2021-08-06 14:35:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:37,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:37,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:35:38,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:38,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602162270] [2021-08-06 14:35:38,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602162270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:38,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205141530] [2021-08-06 14:35:38,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:35:38,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:38,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:38,248 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:38,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2021-08-06 14:35:43,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:35:43,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:43,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:43,934 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:43,935 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 37 treesize of output 34 [2021-08-06 14:35:44,344 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:44,345 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 41 treesize of output 38 [2021-08-06 14:35:44,350 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:44,350 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 42 treesize of output 37 [2021-08-06 14:35:44,425 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 14:35:44,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205141530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:44,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:44,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:35:44,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421851068] [2021-08-06 14:35:44,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:35:44,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:44,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:35:44,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:44,426 INFO L87 Difference]: Start difference. First operand 1063 states and 3477 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:44,783 INFO L93 Difference]: Finished difference Result 1234 states and 3911 transitions. [2021-08-06 14:35:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 14:35:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:35:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:44,786 INFO L225 Difference]: With dead ends: 1234 [2021-08-06 14:35:44,786 INFO L226 Difference]: Without dead ends: 1196 [2021-08-06 14:35:44,786 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:35:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2021-08-06 14:35:44,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1067. [2021-08-06 14:35:44,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 3.276735459662289) internal successors, (3493), 1066 states have internal predecessors, (3493), 0 states have call successors, (0), 0 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 14:35:44,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3493 transitions. [2021-08-06 14:35:44,799 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3493 transitions. Word has length 24 [2021-08-06 14:35:44,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:44,799 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3493 transitions. [2021-08-06 14:35:44,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:44,799 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3493 transitions. [2021-08-06 14:35:44,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:44,800 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:44,800 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:44,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Forceful destruction successful, exit code 0 [2021-08-06 14:35:45,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:45,002 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:45,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:45,002 INFO L82 PathProgramCache]: Analyzing trace with hash -937632607, now seen corresponding path program 149 times [2021-08-06 14:35:45,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:45,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475855089] [2021-08-06 14:35:45,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:45,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:45,275 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:45,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:45,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475855089] [2021-08-06 14:35:45,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475855089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:45,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501980006] [2021-08-06 14:35:45,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:35:45,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:45,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:45,276 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:45,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2021-08-06 14:35:50,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:35:50,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:50,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:50,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:51,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:35:51,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:35:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:35:51,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:51,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501980006] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:51,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:51,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:35:51,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824481515] [2021-08-06 14:35:51,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:35:51,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:35:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:35:51,491 INFO L87 Difference]: Start difference. First operand 1067 states and 3493 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:51,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:51,964 INFO L93 Difference]: Finished difference Result 1338 states and 4235 transitions. [2021-08-06 14:35:51,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:35:51,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:35:51,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:51,967 INFO L225 Difference]: With dead ends: 1338 [2021-08-06 14:35:51,967 INFO L226 Difference]: Without dead ends: 1261 [2021-08-06 14:35:51,967 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 413.6ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-08-06 14:35:51,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2021-08-06 14:35:51,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1069. [2021-08-06 14:35:51,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.2780898876404496) internal successors, (3501), 1068 states have internal predecessors, (3501), 0 states have call successors, (0), 0 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 14:35:51,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3501 transitions. [2021-08-06 14:35:51,980 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3501 transitions. Word has length 24 [2021-08-06 14:35:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:51,981 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3501 transitions. [2021-08-06 14:35:51,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:35:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3501 transitions. [2021-08-06 14:35:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:51,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:51,982 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:52,016 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2021-08-06 14:35:52,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:52,183 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:52,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:52,183 INFO L82 PathProgramCache]: Analyzing trace with hash 420654035, now seen corresponding path program 150 times [2021-08-06 14:35:52,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:52,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689235357] [2021-08-06 14:35:52,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:52,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:52,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:52,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689235357] [2021-08-06 14:35:52,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689235357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:52,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302406046] [2021-08-06 14:35:52,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:35:52,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:52,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:52,541 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:52,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2021-08-06 14:35:58,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:35:58,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:35:58,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:35:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:35:58,362 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:58,363 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 37 treesize of output 34 [2021-08-06 14:35:58,514 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:58,514 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 49 treesize of output 46 [2021-08-06 14:35:58,521 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:35:58,521 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 41 treesize of output 36 [2021-08-06 14:35:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:58,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302406046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:58,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:35:58,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:35:58,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002111762] [2021-08-06 14:35:58,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:35:58,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:35:58,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:35:58,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:35:58,875 INFO L87 Difference]: Start difference. First operand 1069 states and 3501 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:59,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:35:59,365 INFO L93 Difference]: Finished difference Result 1463 states and 4543 transitions. [2021-08-06 14:35:59,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:35:59,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:35:59,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:35:59,368 INFO L225 Difference]: With dead ends: 1463 [2021-08-06 14:35:59,368 INFO L226 Difference]: Without dead ends: 1370 [2021-08-06 14:35:59,368 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:35:59,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-08-06 14:35:59,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1069. [2021-08-06 14:35:59,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1069 states, 1068 states have (on average 3.2780898876404496) internal successors, (3501), 1068 states have internal predecessors, (3501), 0 states have call successors, (0), 0 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 14:35:59,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 3501 transitions. [2021-08-06 14:35:59,381 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 3501 transitions. Word has length 24 [2021-08-06 14:35:59,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:35:59,381 INFO L470 AbstractCegarLoop]: Abstraction has 1069 states and 3501 transitions. [2021-08-06 14:35:59,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:35:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 3501 transitions. [2021-08-06 14:35:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:35:59,382 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:35:59,382 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:35:59,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2021-08-06 14:35:59,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:59,583 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:35:59,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:35:59,583 INFO L82 PathProgramCache]: Analyzing trace with hash -516897493, now seen corresponding path program 151 times [2021-08-06 14:35:59,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:35:59,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748088105] [2021-08-06 14:35:59,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:35:59,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:35:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:35:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:35:59,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:35:59,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748088105] [2021-08-06 14:35:59,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748088105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:35:59,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792171108] [2021-08-06 14:35:59,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:35:59,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:35:59,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:35:59,821 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:35:59,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2021-08-06 14:36:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:05,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:36:05,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:05,598 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:05,598 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 23 treesize of output 22 [2021-08-06 14:36:05,870 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:05,870 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 33 treesize of output 32 [2021-08-06 14:36:05,876 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:05,876 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 27 treesize of output 26 [2021-08-06 14:36:06,027 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:06,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792171108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:06,027 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:06,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:06,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176640365] [2021-08-06 14:36:06,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:06,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:06,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:06,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:06,028 INFO L87 Difference]: Start difference. First operand 1069 states and 3501 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:06,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:06,454 INFO L93 Difference]: Finished difference Result 1434 states and 4470 transitions. [2021-08-06 14:36:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:36:06,454 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:06,456 INFO L225 Difference]: With dead ends: 1434 [2021-08-06 14:36:06,456 INFO L226 Difference]: Without dead ends: 1296 [2021-08-06 14:36:06,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 432.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-08-06 14:36:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2021-08-06 14:36:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1086. [2021-08-06 14:36:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.2912442396313364) internal successors, (3571), 1085 states have internal predecessors, (3571), 0 states have call successors, (0), 0 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 14:36:06,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3571 transitions. [2021-08-06 14:36:06,470 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3571 transitions. Word has length 24 [2021-08-06 14:36:06,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:06,470 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 3571 transitions. [2021-08-06 14:36:06,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:06,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3571 transitions. [2021-08-06 14:36:06,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:06,471 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:06,471 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:06,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2021-08-06 14:36:06,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-08-06 14:36:06,672 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 2136973911, now seen corresponding path program 152 times [2021-08-06 14:36:06,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:06,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528321219] [2021-08-06 14:36:06,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:06,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:06,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:06,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528321219] [2021-08-06 14:36:06,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528321219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:06,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284199231] [2021-08-06 14:36:06,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:36:06,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:06,921 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:06,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2021-08-06 14:36:12,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:12,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:12,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:36:12,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:12,884 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:12,884 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 30 [2021-08-06 14:36:12,973 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:12,973 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 33 treesize of output 32 [2021-08-06 14:36:12,980 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:12,980 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 22 treesize of output 21 [2021-08-06 14:36:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:13,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284199231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:13,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:13,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:13,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420261368] [2021-08-06 14:36:13,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:13,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:13,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:13,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:13,121 INFO L87 Difference]: Start difference. First operand 1086 states and 3571 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:13,381 INFO L93 Difference]: Finished difference Result 1225 states and 3956 transitions. [2021-08-06 14:36:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:36:13,382 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:13,383 INFO L225 Difference]: With dead ends: 1225 [2021-08-06 14:36:13,384 INFO L226 Difference]: Without dead ends: 1163 [2021-08-06 14:36:13,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:13,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-08-06 14:36:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1086. [2021-08-06 14:36:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 3.2912442396313364) internal successors, (3571), 1085 states have internal predecessors, (3571), 0 states have call successors, (0), 0 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 14:36:13,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 3571 transitions. [2021-08-06 14:36:13,396 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 3571 transitions. Word has length 24 [2021-08-06 14:36:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:13,396 INFO L470 AbstractCegarLoop]: Abstraction has 1086 states and 3571 transitions. [2021-08-06 14:36:13,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 3571 transitions. [2021-08-06 14:36:13,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:13,397 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:13,397 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:13,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2021-08-06 14:36:13,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-08-06 14:36:13,598 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:13,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:13,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1555213131, now seen corresponding path program 153 times [2021-08-06 14:36:13,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:13,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076554602] [2021-08-06 14:36:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:13,598 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:13,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:13,902 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:13,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:13,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076554602] [2021-08-06 14:36:13,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076554602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:13,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081913930] [2021-08-06 14:36:13,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:36:13,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:13,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:13,903 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:13,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2021-08-06 14:36:19,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 14:36:19,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:36:19,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:19,669 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:19,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 42 [2021-08-06 14:36:19,873 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:19,873 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 49 treesize of output 46 [2021-08-06 14:36:19,880 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:19,880 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 41 treesize of output 36 [2021-08-06 14:36:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:20,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081913930] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:20,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:20,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:20,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47940015] [2021-08-06 14:36:20,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:20,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:20,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:20,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:20,212 INFO L87 Difference]: Start difference. First operand 1086 states and 3571 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:20,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:20,730 INFO L93 Difference]: Finished difference Result 1495 states and 4734 transitions. [2021-08-06 14:36:20,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:36:20,730 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:20,732 INFO L225 Difference]: With dead ends: 1495 [2021-08-06 14:36:20,732 INFO L226 Difference]: Without dead ends: 1415 [2021-08-06 14:36:20,732 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 509.2ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:36:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-08-06 14:36:20,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 1100. [2021-08-06 14:36:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 3.3011828935395813) internal successors, (3628), 1099 states have internal predecessors, (3628), 0 states have call successors, (0), 0 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 14:36:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3628 transitions. [2021-08-06 14:36:20,746 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3628 transitions. Word has length 24 [2021-08-06 14:36:20,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:20,746 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 3628 transitions. [2021-08-06 14:36:20,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3628 transitions. [2021-08-06 14:36:20,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:20,747 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:20,748 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:20,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2021-08-06 14:36:20,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-08-06 14:36:20,948 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:20,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:20,948 INFO L82 PathProgramCache]: Analyzing trace with hash -466634957, now seen corresponding path program 154 times [2021-08-06 14:36:20,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:20,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805000623] [2021-08-06 14:36:20,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:20,948 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:21,278 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:21,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:21,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805000623] [2021-08-06 14:36:21,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805000623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:21,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627560167] [2021-08-06 14:36:21,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:36:21,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:21,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:21,280 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:21,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2021-08-06 14:36:26,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:36:26,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:26,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:36:26,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:27,120 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:27,120 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 45 treesize of output 42 [2021-08-06 14:36:27,322 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:27,322 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 49 treesize of output 46 [2021-08-06 14:36:27,328 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:27,329 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 41 treesize of output 36 [2021-08-06 14:36:27,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:27,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627560167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:27,619 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:27,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:27,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448121670] [2021-08-06 14:36:27,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:27,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:27,620 INFO L87 Difference]: Start difference. First operand 1100 states and 3628 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:28,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:28,145 INFO L93 Difference]: Finished difference Result 1507 states and 4711 transitions. [2021-08-06 14:36:28,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 14:36:28,146 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:28,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:28,148 INFO L225 Difference]: With dead ends: 1507 [2021-08-06 14:36:28,148 INFO L226 Difference]: Without dead ends: 1430 [2021-08-06 14:36:28,148 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:36:28,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2021-08-06 14:36:28,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 1098. [2021-08-06 14:36:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1098 states, 1097 states have (on average 3.3026435733819506) internal successors, (3623), 1097 states have internal predecessors, (3623), 0 states have call successors, (0), 0 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 14:36:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1098 states to 1098 states and 3623 transitions. [2021-08-06 14:36:28,161 INFO L78 Accepts]: Start accepts. Automaton has 1098 states and 3623 transitions. Word has length 24 [2021-08-06 14:36:28,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:28,161 INFO L470 AbstractCegarLoop]: Abstraction has 1098 states and 3623 transitions. [2021-08-06 14:36:28,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:28,161 INFO L276 IsEmpty]: Start isEmpty. Operand 1098 states and 3623 transitions. [2021-08-06 14:36:28,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:28,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:28,163 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:28,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:28,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:28,363 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1965193057, now seen corresponding path program 155 times [2021-08-06 14:36:28,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:28,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976598158] [2021-08-06 14:36:28,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:28,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:28,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:28,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:28,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976598158] [2021-08-06 14:36:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976598158] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:28,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795369188] [2021-08-06 14:36:28,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:36:28,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:28,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:28,698 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:28,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2021-08-06 14:36:34,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:36:34,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:34,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:36:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:34,528 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:34,528 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 50 treesize of output 47 [2021-08-06 14:36:34,787 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:34,788 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 38 treesize of output 37 [2021-08-06 14:36:34,794 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:34,794 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 27 treesize of output 26 [2021-08-06 14:36:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:34,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795369188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:34,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:34,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:34,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129767057] [2021-08-06 14:36:34,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:34,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:34,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:34,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:34,964 INFO L87 Difference]: Start difference. First operand 1098 states and 3623 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:35,815 INFO L93 Difference]: Finished difference Result 1542 states and 4838 transitions. [2021-08-06 14:36:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 14:36:35,815 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:35,817 INFO L225 Difference]: With dead ends: 1542 [2021-08-06 14:36:35,817 INFO L226 Difference]: Without dead ends: 1421 [2021-08-06 14:36:35,817 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 705.0ms TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-08-06 14:36:35,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-08-06 14:36:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1088. [2021-08-06 14:36:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 3.2934682612695494) internal successors, (3580), 1087 states have internal predecessors, (3580), 0 states have call successors, (0), 0 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 14:36:35,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 3580 transitions. [2021-08-06 14:36:35,831 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 3580 transitions. Word has length 24 [2021-08-06 14:36:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 3580 transitions. [2021-08-06 14:36:35,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 3580 transitions. [2021-08-06 14:36:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:35,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:35,832 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:35,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2021-08-06 14:36:36,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:36,033 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:36,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:36,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1974379607, now seen corresponding path program 156 times [2021-08-06 14:36:36,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:36,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453689196] [2021-08-06 14:36:36,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:36,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:36,339 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:36,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:36,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453689196] [2021-08-06 14:36:36,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453689196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:36,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64023774] [2021-08-06 14:36:36,339 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:36:36,339 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:36,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:36,340 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:36,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2021-08-06 14:36:42,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 14:36:42,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:42,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:36:42,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:42,228 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:42,228 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 38 treesize of output 37 [2021-08-06 14:36:42,446 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:42,446 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 52 treesize of output 49 [2021-08-06 14:36:42,453 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:42,453 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 48 treesize of output 43 [2021-08-06 14:36:42,690 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:42,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64023774] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:42,690 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:42,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:36:42,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033101628] [2021-08-06 14:36:42,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:42,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:42,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:42,691 INFO L87 Difference]: Start difference. First operand 1088 states and 3580 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:43,074 INFO L93 Difference]: Finished difference Result 1279 states and 4075 transitions. [2021-08-06 14:36:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 14:36:43,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:36:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:43,076 INFO L225 Difference]: With dead ends: 1279 [2021-08-06 14:36:43,076 INFO L226 Difference]: Without dead ends: 1195 [2021-08-06 14:36:43,076 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 370.1ms TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 14:36:43,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2021-08-06 14:36:43,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1096. [2021-08-06 14:36:43,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.291324200913242) internal successors, (3604), 1095 states have internal predecessors, (3604), 0 states have call successors, (0), 0 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 14:36:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3604 transitions. [2021-08-06 14:36:43,088 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3604 transitions. Word has length 24 [2021-08-06 14:36:43,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:43,088 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 3604 transitions. [2021-08-06 14:36:43,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:43,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3604 transitions. [2021-08-06 14:36:43,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:43,089 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:43,089 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:43,123 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2021-08-06 14:36:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:43,290 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:43,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2012036845, now seen corresponding path program 157 times [2021-08-06 14:36:43,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:43,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698282686] [2021-08-06 14:36:43,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:43,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:43,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:43,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698282686] [2021-08-06 14:36:43,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698282686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:43,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047130033] [2021-08-06 14:36:43,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:36:43,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:43,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:43,574 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:43,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2021-08-06 14:36:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:36:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:49,543 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:49,543 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 38 treesize of output 37 [2021-08-06 14:36:49,620 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:49,620 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 52 treesize of output 49 [2021-08-06 14:36:49,627 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:49,627 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 48 treesize of output 43 [2021-08-06 14:36:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:50,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047130033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:50,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:50,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 14:36:50,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330701589] [2021-08-06 14:36:50,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 14:36:50,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 14:36:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 14:36:50,001 INFO L87 Difference]: Start difference. First operand 1096 states and 3604 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:50,330 INFO L93 Difference]: Finished difference Result 1224 states and 3954 transitions. [2021-08-06 14:36:50,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:36:50,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 14:36:50,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:50,332 INFO L225 Difference]: With dead ends: 1224 [2021-08-06 14:36:50,333 INFO L226 Difference]: Without dead ends: 1158 [2021-08-06 14:36:50,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 322.6ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:36:50,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2021-08-06 14:36:50,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1094. [2021-08-06 14:36:50,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 3.292772186642269) internal successors, (3599), 1093 states have internal predecessors, (3599), 0 states have call successors, (0), 0 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 14:36:50,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 3599 transitions. [2021-08-06 14:36:50,344 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 3599 transitions. Word has length 24 [2021-08-06 14:36:50,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:50,344 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 3599 transitions. [2021-08-06 14:36:50,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 14:36:50,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 3599 transitions. [2021-08-06 14:36:50,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:50,346 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:50,346 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:50,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Forceful destruction successful, exit code 0 [2021-08-06 14:36:50,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-08-06 14:36:50,546 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1606762527, now seen corresponding path program 158 times [2021-08-06 14:36:50,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:50,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315160747] [2021-08-06 14:36:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:50,547 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:50,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:50,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315160747] [2021-08-06 14:36:50,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315160747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:50,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152334035] [2021-08-06 14:36:50,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 14:36:50,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:50,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:50,852 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:50,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2021-08-06 14:36:56,781 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 14:36:56,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:36:56,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:36:56,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:36:56,950 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:56,950 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 50 treesize of output 47 [2021-08-06 14:36:57,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:57,130 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 54 treesize of output 51 [2021-08-06 14:36:57,139 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:36:57,139 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 48 treesize of output 43 [2021-08-06 14:36:57,459 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:57,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152334035] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:57,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:36:57,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:36:57,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116925767] [2021-08-06 14:36:57,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:36:57,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:36:57,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:36:57,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:36:57,460 INFO L87 Difference]: Start difference. First operand 1094 states and 3599 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:58,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:36:58,086 INFO L93 Difference]: Finished difference Result 1432 states and 4580 transitions. [2021-08-06 14:36:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:36:58,086 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:36:58,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:36:58,088 INFO L225 Difference]: With dead ends: 1432 [2021-08-06 14:36:58,088 INFO L226 Difference]: Without dead ends: 1352 [2021-08-06 14:36:58,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 545.6ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:36:58,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-08-06 14:36:58,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1108. [2021-08-06 14:36:58,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 3.3026196928635954) internal successors, (3656), 1107 states have internal predecessors, (3656), 0 states have call successors, (0), 0 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 14:36:58,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 3656 transitions. [2021-08-06 14:36:58,101 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 3656 transitions. Word has length 24 [2021-08-06 14:36:58,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:36:58,101 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 3656 transitions. [2021-08-06 14:36:58,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:36:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 3656 transitions. [2021-08-06 14:36:58,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:36:58,103 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:36:58,103 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:36:58,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2021-08-06 14:36:58,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:58,303 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:36:58,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:36:58,303 INFO L82 PathProgramCache]: Analyzing trace with hash 666356681, now seen corresponding path program 159 times [2021-08-06 14:36:58,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:36:58,304 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080472831] [2021-08-06 14:36:58,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:36:58,304 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:36:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:36:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:36:58,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:36:58,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080472831] [2021-08-06 14:36:58,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080472831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:36:58,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130168520] [2021-08-06 14:36:58,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 14:36:58,639 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:36:58,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:36:58,639 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:36:58,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2021-08-06 14:37:04,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 14:37:04,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:04,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 14:37:04,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:04,723 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:04,723 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 50 treesize of output 47 [2021-08-06 14:37:04,888 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:04,889 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 54 treesize of output 51 [2021-08-06 14:37:04,896 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:04,896 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 48 treesize of output 43 [2021-08-06 14:37:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:05,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130168520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:05,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:05,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:37:05,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384563941] [2021-08-06 14:37:05,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:37:05,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:05,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:37:05,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:37:05,166 INFO L87 Difference]: Start difference. First operand 1108 states and 3656 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:05,702 INFO L93 Difference]: Finished difference Result 1485 states and 4638 transitions. [2021-08-06 14:37:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:37:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:37:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:05,704 INFO L225 Difference]: With dead ends: 1485 [2021-08-06 14:37:05,704 INFO L226 Difference]: Without dead ends: 1408 [2021-08-06 14:37:05,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:37:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2021-08-06 14:37:05,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1106. [2021-08-06 14:37:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1105 states have (on average 3.304072398190045) internal successors, (3651), 1105 states have internal predecessors, (3651), 0 states have call successors, (0), 0 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 14:37:05,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 3651 transitions. [2021-08-06 14:37:05,718 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 3651 transitions. Word has length 24 [2021-08-06 14:37:05,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:05,718 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 3651 transitions. [2021-08-06 14:37:05,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:05,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 3651 transitions. [2021-08-06 14:37:05,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:37:05,720 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:05,720 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:05,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2021-08-06 14:37:05,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:05,920 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:05,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:05,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1196782601, now seen corresponding path program 160 times [2021-08-06 14:37:05,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:05,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227666328] [2021-08-06 14:37:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:05,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:06,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:06,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227666328] [2021-08-06 14:37:06,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227666328] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:06,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714867312] [2021-08-06 14:37:06,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 14:37:06,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:06,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:06,282 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:06,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2021-08-06 14:37:12,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 14:37:12,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:12,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:37:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:12,405 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:12,405 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 50 treesize of output 47 [2021-08-06 14:37:12,650 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:12,650 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 38 treesize of output 37 [2021-08-06 14:37:12,658 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:12,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-08-06 14:37:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:12,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714867312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:12,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:12,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:37:12,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289541259] [2021-08-06 14:37:12,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:37:12,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:37:12,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:37:12,849 INFO L87 Difference]: Start difference. First operand 1106 states and 3651 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:13,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:13,168 INFO L93 Difference]: Finished difference Result 1268 states and 4090 transitions. [2021-08-06 14:37:13,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 14:37:13,168 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:37:13,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:13,170 INFO L225 Difference]: With dead ends: 1268 [2021-08-06 14:37:13,170 INFO L226 Difference]: Without dead ends: 1206 [2021-08-06 14:37:13,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 307.6ms TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-08-06 14:37:13,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1206 states. [2021-08-06 14:37:13,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1206 to 1096. [2021-08-06 14:37:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.2949771689497718) internal successors, (3608), 1095 states have internal predecessors, (3608), 0 states have call successors, (0), 0 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 14:37:13,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3608 transitions. [2021-08-06 14:37:13,182 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3608 transitions. Word has length 24 [2021-08-06 14:37:13,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:13,182 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 3608 transitions. [2021-08-06 14:37:13,182 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:13,183 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3608 transitions. [2021-08-06 14:37:13,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:37:13,184 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:13,184 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:13,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2021-08-06 14:37:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:13,384 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:13,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:13,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2095155597, now seen corresponding path program 161 times [2021-08-06 14:37:13,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:13,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272051088] [2021-08-06 14:37:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:13,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:13,615 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:13,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:13,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272051088] [2021-08-06 14:37:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272051088] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:13,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338053015] [2021-08-06 14:37:13,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 14:37:13,616 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:13,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:13,616 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:13,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2021-08-06 14:37:19,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 14:37:19,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:19,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:37:19,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:19,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-06 14:37:19,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-06 14:37:19,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-08-06 14:37:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:20,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338053015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:20,049 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:20,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:37:20,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022837356] [2021-08-06 14:37:20,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:37:20,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:37:20,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:37:20,050 INFO L87 Difference]: Start difference. First operand 1096 states and 3608 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:20,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:20,431 INFO L93 Difference]: Finished difference Result 1384 states and 4464 transitions. [2021-08-06 14:37:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 14:37:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:37:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:20,433 INFO L225 Difference]: With dead ends: 1384 [2021-08-06 14:37:20,433 INFO L226 Difference]: Without dead ends: 1326 [2021-08-06 14:37:20,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-08-06 14:37:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-08-06 14:37:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1133. [2021-08-06 14:37:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 3.2968197879858656) internal successors, (3732), 1132 states have internal predecessors, (3732), 0 states have call successors, (0), 0 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 14:37:20,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 3732 transitions. [2021-08-06 14:37:20,447 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 3732 transitions. Word has length 24 [2021-08-06 14:37:20,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:20,447 INFO L470 AbstractCegarLoop]: Abstraction has 1133 states and 3732 transitions. [2021-08-06 14:37:20,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:20,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 3732 transitions. [2021-08-06 14:37:20,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:37:20,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:20,449 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:20,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:20,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:20,649 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:20,649 INFO L82 PathProgramCache]: Analyzing trace with hash -931222423, now seen corresponding path program 162 times [2021-08-06 14:37:20,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:20,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772634439] [2021-08-06 14:37:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:20,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:20,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:20,878 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:20,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:20,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772634439] [2021-08-06 14:37:20,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772634439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:20,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149472918] [2021-08-06 14:37:20,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 14:37:20,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:20,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:20,879 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:20,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2021-08-06 14:37:26,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 14:37:26,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 14:37:26,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:37:26,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:27,110 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:27,110 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 37 treesize of output 34 [2021-08-06 14:37:27,298 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:27,298 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 49 treesize of output 46 [2021-08-06 14:37:27,304 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-06 14:37:27,305 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 46 treesize of output 41 [2021-08-06 14:37:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:27,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149472918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:27,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 14:37:27,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 14:37:27,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328185605] [2021-08-06 14:37:27,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 14:37:27,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 14:37:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 14:37:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-08-06 14:37:27,583 INFO L87 Difference]: Start difference. First operand 1133 states and 3732 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:28,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 14:37:28,272 INFO L93 Difference]: Finished difference Result 1429 states and 4524 transitions. [2021-08-06 14:37:28,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 14:37:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 24 [2021-08-06 14:37:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 14:37:28,275 INFO L225 Difference]: With dead ends: 1429 [2021-08-06 14:37:28,275 INFO L226 Difference]: Without dead ends: 1341 [2021-08-06 14:37:28,275 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 538.1ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-06 14:37:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2021-08-06 14:37:28,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1124. [2021-08-06 14:37:28,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1123 states have (on average 3.302760463045414) internal successors, (3709), 1123 states have internal predecessors, (3709), 0 states have call successors, (0), 0 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 14:37:28,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 3709 transitions. [2021-08-06 14:37:28,288 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 3709 transitions. Word has length 24 [2021-08-06 14:37:28,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 14:37:28,288 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 3709 transitions. [2021-08-06 14:37:28,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 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 14:37:28,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 3709 transitions. [2021-08-06 14:37:28,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 14:37:28,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 14:37:28,290 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 14:37:28,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:28,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-08-06 14:37:28,497 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 14:37:28,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 14:37:28,497 INFO L82 PathProgramCache]: Analyzing trace with hash -2005835981, now seen corresponding path program 163 times [2021-08-06 14:37:28,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 14:37:28,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515479688] [2021-08-06 14:37:28,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 14:37:28,497 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 14:37:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-08-06 14:37:28,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 14:37:28,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515479688] [2021-08-06 14:37:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515479688] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 14:37:28,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797232442] [2021-08-06 14:37:28,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 14:37:28,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 14:37:28,757 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 14:37:28,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process Received shutdown request... [2021-08-06 14:37:34,782 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 14:37:34,782 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 14:37:34,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 14:37:34,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 14:37:34,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 14:37:34,834 WARN L223 SmtUtils]: Removed 1 from assertion stack [2021-08-06 14:37:34,835 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 14:37:34,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Forceful destruction successful, exit code 0 [2021-08-06 14:37:35,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 14:37:35,036 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. [2021-08-06 14:37:35,037 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 14:37:35,038 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 14:37:35,038 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 14:37:35,041 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 14:37:35,041 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 14:37:35,042 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 02:37:35 BasicIcfg [2021-08-06 14:37:35,042 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 14:37:35,042 INFO L168 Benchmark]: Toolchain (without parser) took 739646.21 ms. Allocated memory was 127.9 MB in the beginning and 1.5 GB in the end (delta: 1.4 GB). Free memory was 107.7 MB in the beginning and 1.0 GB in the end (delta: -901.9 MB). Peak memory consumption was 482.2 MB. Max. memory is 8.0 GB. [2021-08-06 14:37:35,042 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory was 108.9 MB in the beginning and 108.9 MB in the end (delta: 78.9 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 14:37:35,043 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.33 ms. Allocated memory is still 127.9 MB. Free memory was 107.6 MB in the beginning and 106.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:37:35,043 INFO L168 Benchmark]: Boogie Preprocessor took 13.78 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 105.1 MB in the end (delta: 947.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 14:37:35,043 INFO L168 Benchmark]: RCFGBuilder took 424.80 ms. Allocated memory was 127.9 MB in the beginning and 177.2 MB in the end (delta: 49.3 MB). Free memory was 105.0 MB in the beginning and 152.6 MB in the end (delta: -47.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. [2021-08-06 14:37:35,043 INFO L168 Benchmark]: TraceAbstraction took 739182.13 ms. Allocated memory was 177.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 152.0 MB in the beginning and 1.0 GB in the end (delta: -857.6 MB). Peak memory consumption was 476.1 MB. Max. memory is 8.0 GB. [2021-08-06 14:37:35,043 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 127.9 MB. Free memory was 108.9 MB in the beginning and 108.9 MB in the end (delta: 78.9 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.33 ms. Allocated memory is still 127.9 MB. Free memory was 107.6 MB in the beginning and 106.2 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 13.78 ms. Allocated memory is still 127.9 MB. Free memory was 106.1 MB in the beginning and 105.1 MB in the end (delta: 947.7 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 424.80 ms. Allocated memory was 127.9 MB in the beginning and 177.2 MB in the end (delta: 49.3 MB). Free memory was 105.0 MB in the beginning and 152.6 MB in the end (delta: -47.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 739182.13 ms. Allocated memory was 177.2 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 152.0 MB in the beginning and 1.0 GB in the end (delta: -857.6 MB). Peak memory consumption was 476.1 MB. 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: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 97]: 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 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 101]: 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 25 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 1 for 0ms.. - TimeoutResultAtElement [Line: 100]: 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 25 with TraceHistMax 5,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 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 739080.2ms, OverallIterations: 179, TraceHistogramMax: 5, EmptinessCheckTime: 181.6ms, AutomataDifference: 79420.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 33.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10069 SDtfs, 15336 SDslu, 62880 SDs, 0 SdLazy, 72670 SolverSat, 3887 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33275.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6524 GetRequests, 2800 SyntacticMatches, 295 SemanticMatches, 3429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14139 ImplicationChecksByTransitivity, 75563.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1133occurred in iteration=177, InterpolantAutomatonStates: 2437, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1620.4ms AutomataMinimizationTime, 178 MinimizatonAttempts, 35291 StatesRemovedByMinimization, 175 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 892.6ms SsaConstructionTime, 3400.3ms SatisfiabilityAnalysisTime, 128393.6ms InterpolantComputationTime, 8050 NumberOfCodeBlocks, 8025 NumberOfCodeBlocksAsserted, 577 NumberOfCheckSat, 7710 ConstructedInterpolants, 421 QuantifiedInterpolants, 132008 SizeOfPredicates, 1587 NumberOfNonLiveVariables, 17413 ConjunctsInSsa, 3876 ConjunctsInUnsatCore, 340 InterpolantComputations, 16 PerfectInterpolantSequences, 2329/5450 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