/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 22:25:11,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 22:25:11,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 22:25:11,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 22:25:11,744 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 22:25:11,745 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 22:25:11,745 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 22:25:11,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 22:25:11,774 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 22:25:11,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 22:25:11,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 22:25:11,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 22:25:11,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 22:25:11,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 22:25:11,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 22:25:11,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:25:11,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 22:25:11,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 22:25:11,778 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 22:25:11,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 22:25:11,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 22:25:11,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 22:25:11,957 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 22:25:11,960 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 22:25:11,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2022-03-15 22:25:11,969 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2022-03-15 22:25:11,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 22:25:11,995 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 22:25:11,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 22:25:11,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 22:25:11,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 22:25:12,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,009 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,014 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 22:25:12,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 22:25:12,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 22:25:12,017 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 22:25:12,017 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 22:25:12,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,025 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,026 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,026 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 22:25:12,027 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 22:25:12,027 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 22:25:12,027 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 22:25:12,032 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/1) ... [2022-03-15 22:25:12,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:25:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:12,062 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 22:25:12,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 22:25:12,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 22:25:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 22:25:12,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 22:25:12,093 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 22:25:12,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 22:25:12,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 22:25:12,094 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 22:25:12,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 22:25:12,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 22:25:12,095 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 22:25:12,137 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 22:25:12,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 22:25:12,211 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 22:25:12,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 22:25:12,221 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-15 22:25:12,222 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-15 22:25:12,222 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-15 22:25:12,223 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:25:12 BoogieIcfgContainer [2022-03-15 22:25:12,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 22:25:12,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 22:25:12,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 22:25:12,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 22:25:12,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:25:11" (1/2) ... [2022-03-15 22:25:12,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e60d27f and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 10:25:12, skipping insertion in model container [2022-03-15 22:25:12,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:25:12" (2/2) ... [2022-03-15 22:25:12,232 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2022-03-15 22:25:12,243 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 22:25:12,246 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 22:25:12,246 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 22:25:12,246 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 22:25:12,266 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 22:25:12,295 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 22:25:12,299 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 22:25:12,300 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 22:25:12,306 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 22:25:12,315 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 20 places, 15 transitions, 46 flow [2022-03-15 22:25:12,318 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 20 places, 15 transitions, 46 flow [2022-03-15 22:25:12,320 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 46 flow [2022-03-15 22:25:12,341 INFO L129 PetriNetUnfolder]: 2/13 cut-off events. [2022-03-15 22:25:12,342 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 22:25:12,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22 conditions, 13 events. 2/13 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 6 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 8. Up to 2 conditions per place. [2022-03-15 22:25:12,348 INFO L116 LiptonReduction]: Number of co-enabled transitions 16 [2022-03-15 22:25:12,404 INFO L131 LiptonReduction]: Checked pairs total: 18 [2022-03-15 22:25:12,404 INFO L133 LiptonReduction]: Total number of compositions: 3 [2022-03-15 22:25:12,430 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 18 places, 13 transitions, 42 flow [2022-03-15 22:25:12,438 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 22:25:12,444 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:12,444 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:12,445 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash -302208907, now seen corresponding path program 1 times [2022-03-15 22:25:12,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:12,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304023935] [2022-03-15 22:25:12,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:12,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:12,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:12,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304023935] [2022-03-15 22:25:12,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304023935] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:25:12,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:25:12,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 22:25:12,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1347730881] [2022-03-15 22:25:12,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:12,629 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:12,638 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 22:25:12,639 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:12,719 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:12,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:25:12,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:12,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:25:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:25:12,745 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:12,769 INFO L93 Difference]: Finished difference Result 19 states and 33 transitions. [2022-03-15 22:25:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:25:12,772 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 22:25:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:12,777 INFO L225 Difference]: With dead ends: 19 [2022-03-15 22:25:12,778 INFO L226 Difference]: Without dead ends: 15 [2022-03-15 22:25:12,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:25:12,784 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:12,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 5 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-15 22:25:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-15 22:25:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 26 transitions. [2022-03-15 22:25:12,813 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 26 transitions. Word has length 8 [2022-03-15 22:25:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:12,814 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 26 transitions. [2022-03-15 22:25:12,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 26 transitions. [2022-03-15 22:25:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-15 22:25:12,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:12,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:12,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 22:25:12,816 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:12,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:12,817 INFO L85 PathProgramCache]: Analyzing trace with hash -778518472, now seen corresponding path program 1 times [2022-03-15 22:25:12,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:12,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205132697] [2022-03-15 22:25:12,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:12,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:12,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:12,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205132697] [2022-03-15 22:25:12,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205132697] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:25:12,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:25:12,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-15 22:25:12,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978519645] [2022-03-15 22:25:12,862 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:12,863 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:12,866 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 19 transitions. [2022-03-15 22:25:12,866 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:12,894 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:12,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:25:12,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:25:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:25:12,896 INFO L87 Difference]: Start difference. First operand 15 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:12,913 INFO L93 Difference]: Finished difference Result 20 states and 33 transitions. [2022-03-15 22:25:12,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:25:12,914 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-03-15 22:25:12,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:12,915 INFO L225 Difference]: With dead ends: 20 [2022-03-15 22:25:12,915 INFO L226 Difference]: Without dead ends: 17 [2022-03-15 22:25:12,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:25:12,917 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:12,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 5 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-15 22:25:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-15 22:25:12,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 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) [2022-03-15 22:25:12,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 29 transitions. [2022-03-15 22:25:12,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 29 transitions. Word has length 9 [2022-03-15 22:25:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:12,925 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 29 transitions. [2022-03-15 22:25:12,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 29 transitions. [2022-03-15 22:25:12,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 22:25:12,926 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:12,926 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:12,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 22:25:12,926 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:12,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1140223721, now seen corresponding path program 1 times [2022-03-15 22:25:12,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:12,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143989926] [2022-03-15 22:25:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:12,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:12,969 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:12,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143989926] [2022-03-15 22:25:12,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143989926] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:12,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602771462] [2022-03-15 22:25:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:12,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:12,975 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:12,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 22:25:13,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-15 22:25:13,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:13,092 INFO L387 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 [2022-03-15 22:25:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:13,150 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-15 22:25:13,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 11 [2022-03-15 22:25:13,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602771462] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:13,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:13,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-15 22:25:13,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [418134007] [2022-03-15 22:25:13,160 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:13,161 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:13,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 22 transitions. [2022-03-15 22:25:13,162 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:13,214 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [215#(or (= (select queue front) 5) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:13,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:25:13,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:13,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:25:13,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:25:13,215 INFO L87 Difference]: Start difference. First operand 17 states and 29 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:13,256 INFO L93 Difference]: Finished difference Result 24 states and 42 transitions. [2022-03-15 22:25:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 22:25:13,257 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 22:25:13,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:13,257 INFO L225 Difference]: With dead ends: 24 [2022-03-15 22:25:13,258 INFO L226 Difference]: Without dead ends: 20 [2022-03-15 22:25:13,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:25:13,258 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 11 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:13,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:13,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-03-15 22:25:13,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-03-15 22:25:13,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2022-03-15 22:25:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2022-03-15 22:25:13,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2022-03-15 22:25:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2022-03-15 22:25:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2022-03-15 22:25:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-15 22:25:13,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:13,263 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:13,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:13,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:13,473 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:13,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:13,473 INFO L85 PathProgramCache]: Analyzing trace with hash -987173930, now seen corresponding path program 2 times [2022-03-15 22:25:13,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:13,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188775167] [2022-03-15 22:25:13,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:13,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:13,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:13,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188775167] [2022-03-15 22:25:13,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188775167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:13,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710843058] [2022-03-15 22:25:13,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:13,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:13,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:13,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:13,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 22:25:13,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:13,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:13,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-15 22:25:13,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:13,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710843058] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:13,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:13,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2022-03-15 22:25:13,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1252809508] [2022-03-15 22:25:13,595 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:13,595 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:13,597 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2022-03-15 22:25:13,597 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:13,649 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:13,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:13,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-15 22:25:13,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:13,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-15 22:25:13,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 22:25:13,654 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:13,685 INFO L93 Difference]: Finished difference Result 47 states and 79 transitions. [2022-03-15 22:25:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-15 22:25:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-15 22:25:13,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:13,687 INFO L225 Difference]: With dead ends: 47 [2022-03-15 22:25:13,687 INFO L226 Difference]: Without dead ends: 42 [2022-03-15 22:25:13,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-15 22:25:13,688 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:13,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 10 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:13,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-15 22:25:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2022-03-15 22:25:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 61 transitions. [2022-03-15 22:25:13,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 61 transitions. Word has length 11 [2022-03-15 22:25:13,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:13,693 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 61 transitions. [2022-03-15 22:25:13,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 61 transitions. [2022-03-15 22:25:13,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:25:13,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:13,693 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:13,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:13,911 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,SelfDestructingSolverStorable3 [2022-03-15 22:25:13,912 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:13,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:13,912 INFO L85 PathProgramCache]: Analyzing trace with hash -693567243, now seen corresponding path program 3 times [2022-03-15 22:25:13,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:13,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106569826] [2022-03-15 22:25:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:13,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:13,977 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:13,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106569826] [2022-03-15 22:25:13,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106569826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:13,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563248210] [2022-03-15 22:25:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:13,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:13,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:13,979 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:13,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 22:25:14,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-15 22:25:14,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:25:14,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:14,104 INFO L387 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 [2022-03-15 22:25:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:14,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:14,153 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:14,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:14,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563248210] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:14,171 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:14,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-15 22:25:14,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2092961148] [2022-03-15 22:25:14,171 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:14,172 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:14,173 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 30 transitions. [2022-03-15 22:25:14,173 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:14,258 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [533#(or (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)) (= 5 (select queue (+ front 1)))), 532#(or (not (= (select queue (+ size front)) 5)) (= 5 (select queue (+ front 1))))] [2022-03-15 22:25:14,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:25:14,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:25:14,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:25:14,259 INFO L87 Difference]: Start difference. First operand 32 states and 61 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:14,349 INFO L93 Difference]: Finished difference Result 64 states and 114 transitions. [2022-03-15 22:25:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:25:14,349 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 22:25:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:14,349 INFO L225 Difference]: With dead ends: 64 [2022-03-15 22:25:14,350 INFO L226 Difference]: Without dead ends: 38 [2022-03-15 22:25:14,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-03-15 22:25:14,350 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:14,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:14,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-15 22:25:14,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2022-03-15 22:25:14,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 45 transitions. [2022-03-15 22:25:14,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 45 transitions. Word has length 12 [2022-03-15 22:25:14,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:14,354 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 45 transitions. [2022-03-15 22:25:14,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,354 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 45 transitions. [2022-03-15 22:25:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-15 22:25:14,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:14,354 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:14,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:14,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:14,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:14,568 INFO L85 PathProgramCache]: Analyzing trace with hash -25725000, now seen corresponding path program 4 times [2022-03-15 22:25:14,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:14,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887587673] [2022-03-15 22:25:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:14,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:14,606 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:14,606 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887587673] [2022-03-15 22:25:14,606 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887587673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:14,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774202239] [2022-03-15 22:25:14,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:25:14,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:14,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:14,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:14,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 22:25:14,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:25:14,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:14,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 22:25:14,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:14,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:14,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:14,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774202239] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:14,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:14,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-03-15 22:25:14,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [138374179] [2022-03-15 22:25:14,689 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:14,690 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:14,691 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2022-03-15 22:25:14,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:14,729 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:14,741 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:14,744 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:14,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 22:25:14,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:14,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 22:25:14,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 22:25:14,745 INFO L87 Difference]: Start difference. First operand 25 states and 45 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:14,769 INFO L93 Difference]: Finished difference Result 69 states and 121 transitions. [2022-03-15 22:25:14,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 22:25:14,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-15 22:25:14,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:14,770 INFO L225 Difference]: With dead ends: 69 [2022-03-15 22:25:14,771 INFO L226 Difference]: Without dead ends: 62 [2022-03-15 22:25:14,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 22:25:14,771 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:14,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-03-15 22:25:14,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 47. [2022-03-15 22:25:14,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 2.0434782608695654) internal successors, (94), 46 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 94 transitions. [2022-03-15 22:25:14,775 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 94 transitions. Word has length 13 [2022-03-15 22:25:14,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:14,776 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 94 transitions. [2022-03-15 22:25:14,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 94 transitions. [2022-03-15 22:25:14,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:25:14,776 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:14,776 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:14,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:14,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:14,993 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:14,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:14,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1337540329, now seen corresponding path program 5 times [2022-03-15 22:25:14,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:14,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286972903] [2022-03-15 22:25:14,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:14,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:15,060 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:15,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286972903] [2022-03-15 22:25:15,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286972903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:15,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904365902] [2022-03-15 22:25:15,060 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:25:15,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:15,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:15,076 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:15,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 22:25:15,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:25:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:25:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:19,314 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:25:19,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:25:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:19,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:19,420 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:19,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:19,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904365902] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:19,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:19,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-03-15 22:25:19,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [943066337] [2022-03-15 22:25:19,437 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:19,438 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:19,440 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 38 transitions. [2022-03-15 22:25:19,440 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:19,588 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [992#(or (= 5 (select queue (+ 2 front))) (not (= (select queue (+ size front)) 5))), 993#(or (= 5 (select queue (+ 2 front))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 994#(or (= 5 (select queue (+ 2 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:19,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:25:19,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:19,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:25:19,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=333, Unknown=2, NotChecked=0, Total=420 [2022-03-15 22:25:19,589 INFO L87 Difference]: Start difference. First operand 47 states and 94 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:19,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:19,739 INFO L93 Difference]: Finished difference Result 96 states and 176 transitions. [2022-03-15 22:25:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:25:19,740 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 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 14 [2022-03-15 22:25:19,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:19,740 INFO L225 Difference]: With dead ends: 96 [2022-03-15 22:25:19,740 INFO L226 Difference]: Without dead ends: 56 [2022-03-15 22:25:19,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=156, Invalid=544, Unknown=2, NotChecked=0, Total=702 [2022-03-15 22:25:19,741 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:19,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 55 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:19,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-15 22:25:19,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 30. [2022-03-15 22:25:19,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:19,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 55 transitions. [2022-03-15 22:25:19,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 55 transitions. Word has length 14 [2022-03-15 22:25:19,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:19,744 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 55 transitions. [2022-03-15 22:25:19,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:19,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 55 transitions. [2022-03-15 22:25:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-15 22:25:19,744 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:19,744 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:19,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:19,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:19,956 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1485945814, now seen corresponding path program 6 times [2022-03-15 22:25:19,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:19,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005406509] [2022-03-15 22:25:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:19,987 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:19,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005406509] [2022-03-15 22:25:19,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005406509] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:19,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668916194] [2022-03-15 22:25:19,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:25:19,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:19,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:19,989 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:20,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:25:20,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:20,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 22:25:20,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 22:25:20,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668916194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:20,072 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:20,072 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-03-15 22:25:20,072 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1172625952] [2022-03-15 22:25:20,072 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:20,074 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:20,077 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 43 transitions. [2022-03-15 22:25:20,077 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:20,129 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:20,138 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:20,147 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:20,150 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:20,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:25:20,150 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:20,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:25:20,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:25:20,151 INFO L87 Difference]: Start difference. First operand 30 states and 55 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:20,187 INFO L93 Difference]: Finished difference Result 94 states and 169 transitions. [2022-03-15 22:25:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:25:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 15 [2022-03-15 22:25:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:20,188 INFO L225 Difference]: With dead ends: 94 [2022-03-15 22:25:20,188 INFO L226 Difference]: Without dead ends: 85 [2022-03-15 22:25:20,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:25:20,188 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:20,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 18 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:20,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-15 22:25:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-03-15 22:25:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.078125) internal successors, (133), 64 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 133 transitions. [2022-03-15 22:25:20,193 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 133 transitions. Word has length 15 [2022-03-15 22:25:20,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:20,193 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 133 transitions. [2022-03-15 22:25:20,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 133 transitions. [2022-03-15 22:25:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:25:20,193 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:20,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:20,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:20,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:20,407 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:20,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:20,408 INFO L85 PathProgramCache]: Analyzing trace with hash -743167627, now seen corresponding path program 7 times [2022-03-15 22:25:20,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:20,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899765218] [2022-03-15 22:25:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:20,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899765218] [2022-03-15 22:25:20,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899765218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:20,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719194931] [2022-03-15 22:25:20,486 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:25:20,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:20,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:20,487 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:20,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 22:25:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:20,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:25:20,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:20,567 INFO L387 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 15 treesize of output 7 [2022-03-15 22:25:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:20,608 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:20,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:20,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719194931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:20,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:20,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-03-15 22:25:20,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444744116] [2022-03-15 22:25:20,630 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:20,631 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:20,633 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 46 transitions. [2022-03-15 22:25:20,633 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:20,815 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [1578#(or (= 5 (select queue (+ 3 front))) (not (= (select queue (+ size front)) 5))), 1581#(or (= 5 (select queue (+ 3 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 1580#(or (= 5 (select queue (+ 3 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 1579#(or (= 5 (select queue (+ 3 front))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:20,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:25:20,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:20,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:25:20,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:25:20,816 INFO L87 Difference]: Start difference. First operand 65 states and 133 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2022-03-15 22:25:20,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:20,994 INFO L93 Difference]: Finished difference Result 134 states and 250 transitions. [2022-03-15 22:25:20,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:25:20,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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 16 [2022-03-15 22:25:20,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:20,995 INFO L225 Difference]: With dead ends: 134 [2022-03-15 22:25:20,995 INFO L226 Difference]: Without dead ends: 78 [2022-03-15 22:25:20,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:25:20,996 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:20,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 85 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:20,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-15 22:25:20,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 35. [2022-03-15 22:25:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 65 transitions. [2022-03-15 22:25:20,999 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 65 transitions. Word has length 16 [2022-03-15 22:25:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:20,999 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 65 transitions. [2022-03-15 22:25:20,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 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) [2022-03-15 22:25:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 65 transitions. [2022-03-15 22:25:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-15 22:25:20,999 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:20,999 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:21,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:21,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:21,210 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1563336904, now seen corresponding path program 8 times [2022-03-15 22:25:21,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:21,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772229486] [2022-03-15 22:25:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:21,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:21,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772229486] [2022-03-15 22:25:21,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772229486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:21,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118735174] [2022-03-15 22:25:21,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:21,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:21,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:21,251 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:21,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 22:25:21,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:21,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:21,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:25:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118735174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:21,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:21,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-03-15 22:25:21,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [979171050] [2022-03-15 22:25:21,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:21,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:21,352 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 51 transitions. [2022-03-15 22:25:21,352 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:21,417 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:21,425 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:21,433 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:21,441 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:21,443 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:21,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:25:21,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:21,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:25:21,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:25:21,444 INFO L87 Difference]: Start difference. First operand 35 states and 65 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2022-03-15 22:25:21,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:21,473 INFO L93 Difference]: Finished difference Result 122 states and 223 transitions. [2022-03-15 22:25:21,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:25:21,473 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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 17 [2022-03-15 22:25:21,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:21,474 INFO L225 Difference]: With dead ends: 122 [2022-03-15 22:25:21,474 INFO L226 Difference]: Without dead ends: 111 [2022-03-15 22:25:21,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:25:21,474 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:21,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-15 22:25:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2022-03-15 22:25:21,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.0941176470588236) internal successors, (178), 85 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:21,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 178 transitions. [2022-03-15 22:25:21,479 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 178 transitions. Word has length 17 [2022-03-15 22:25:21,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:21,479 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 178 transitions. [2022-03-15 22:25:21,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 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) [2022-03-15 22:25:21,479 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 178 transitions. [2022-03-15 22:25:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:25:21,480 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:21,480 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:21,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:21,696 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,SelfDestructingSolverStorable9 [2022-03-15 22:25:21,697 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:21,697 INFO L85 PathProgramCache]: Analyzing trace with hash -552673001, now seen corresponding path program 9 times [2022-03-15 22:25:21,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:21,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188620277] [2022-03-15 22:25:21,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:21,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:21,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:21,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188620277] [2022-03-15 22:25:21,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188620277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:21,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031139155] [2022-03-15 22:25:21,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:21,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:21,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:21,812 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:21,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 22:25:21,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:25:21,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:21,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:25:21,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:21,905 INFO L387 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 [2022-03-15 22:25:21,909 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:21,934 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:21,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:21,959 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:21,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031139155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:21,959 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:21,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-03-15 22:25:21,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [312962600] [2022-03-15 22:25:21,960 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:21,961 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:21,965 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 54 transitions. [2022-03-15 22:25:21,965 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:22,209 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [2317#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= (select queue (+ front 4)) 5) (not (= (select queue (+ size front)) 5))), 2318#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= (select queue (+ front 4)) 5) (not (= (select queue (+ size front)) 5))), 2314#(or (= (select queue (+ front 4)) 5) (not (= (select queue (+ size front)) 5))), 2315#(or (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ front 4)) 5) (not (= (select queue (+ size front)) 5))), 2316#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ front 4)) 5) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:22,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:25:22,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:22,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:25:22,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:25:22,210 INFO L87 Difference]: Start difference. First operand 86 states and 178 transitions. Second operand has 18 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) [2022-03-15 22:25:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:22,471 INFO L93 Difference]: Finished difference Result 178 states and 336 transitions. [2022-03-15 22:25:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:25:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 18 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 18 [2022-03-15 22:25:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:22,472 INFO L225 Difference]: With dead ends: 178 [2022-03-15 22:25:22,472 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 22:25:22,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=593, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:25:22,473 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 111 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:22,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 133 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:25:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 22:25:22,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 40. [2022-03-15 22:25:22,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:22,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 75 transitions. [2022-03-15 22:25:22,476 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 75 transitions. Word has length 18 [2022-03-15 22:25:22,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:22,476 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 75 transitions. [2022-03-15 22:25:22,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 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) [2022-03-15 22:25:22,476 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 75 transitions. [2022-03-15 22:25:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-15 22:25:22,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:22,476 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:22,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:22,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:22,691 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:22,692 INFO L85 PathProgramCache]: Analyzing trace with hash 47029206, now seen corresponding path program 10 times [2022-03-15 22:25:22,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:22,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422301043] [2022-03-15 22:25:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:22,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:22,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:22,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422301043] [2022-03-15 22:25:22,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422301043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:22,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386814897] [2022-03-15 22:25:22,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:25:22,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:22,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:22,772 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:22,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 22:25:22,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:25:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:25:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:22,828 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:22,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:22,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:22,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386814897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:22,859 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:22,859 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2022-03-15 22:25:22,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1888695470] [2022-03-15 22:25:22,860 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:22,861 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:22,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 59 transitions. [2022-03-15 22:25:22,864 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:22,915 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:22,924 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:22,932 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:22,939 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:22,947 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:22,949 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:22,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 22:25:22,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:22,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 22:25:22,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:25:22,950 INFO L87 Difference]: Start difference. First operand 40 states and 75 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:22,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:22,990 INFO L93 Difference]: Finished difference Result 153 states and 283 transitions. [2022-03-15 22:25:22,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:25:22,991 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 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 19 [2022-03-15 22:25:22,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:22,992 INFO L225 Difference]: With dead ends: 153 [2022-03-15 22:25:22,992 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 22:25:22,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:25:22,992 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:22,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 32 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:22,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 22:25:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2022-03-15 22:25:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.1009174311926606) internal successors, (229), 109 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 229 transitions. [2022-03-15 22:25:23,005 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 229 transitions. Word has length 19 [2022-03-15 22:25:23,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:23,005 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 229 transitions. [2022-03-15 22:25:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 229 transitions. [2022-03-15 22:25:23,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:25:23,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:23,007 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:23,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:23,223 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,SelfDestructingSolverStorable11 [2022-03-15 22:25:23,223 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:23,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:23,224 INFO L85 PathProgramCache]: Analyzing trace with hash 632431093, now seen corresponding path program 11 times [2022-03-15 22:25:23,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:23,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978887864] [2022-03-15 22:25:23,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:23,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:23,349 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:23,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978887864] [2022-03-15 22:25:23,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978887864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:23,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726058998] [2022-03-15 22:25:23,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:25:23,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:23,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:23,351 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:23,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 22:25:23,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:25:23,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:25:23,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:40,530 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:25:40,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:25:40,536 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 27 refuted. 14 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:40,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:40,705 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:40,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:40,734 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:40,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726058998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:40,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:40,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-03-15 22:25:40,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1336898025] [2022-03-15 22:25:40,734 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:40,736 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:40,739 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 62 transitions. [2022-03-15 22:25:40,739 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:41,135 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 6 new interpolants: [3237#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ 5 front)) 5) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 3233#(or (= (select queue (+ 5 front)) 5) (not (= (select queue (+ size front)) 5))), 3236#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ 5 front)) 5) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 3235#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ 5 front)) 5) (not (= (select queue (+ size front)) 5))), 3238#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ 5 front)) 5) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 3234#(or (not (= 5 (select queue (+ size front 1)))) (= (select queue (+ 5 front)) 5) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:41,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:25:41,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:41,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:25:41,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1229, Unknown=15, NotChecked=0, Total=1482 [2022-03-15 22:25:41,136 INFO L87 Difference]: Start difference. First operand 110 states and 229 transitions. Second operand has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:41,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:41,530 INFO L93 Difference]: Finished difference Result 228 states and 434 transitions. [2022-03-15 22:25:41,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:25:41,531 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 22:25:41,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:41,531 INFO L225 Difference]: With dead ends: 228 [2022-03-15 22:25:41,531 INFO L226 Difference]: Without dead ends: 134 [2022-03-15 22:25:41,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=471, Invalid=2064, Unknown=15, NotChecked=0, Total=2550 [2022-03-15 22:25:41,532 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 138 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:41,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 170 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:25:41,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-03-15 22:25:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 45. [2022-03-15 22:25:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 85 transitions. [2022-03-15 22:25:41,534 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 85 transitions. Word has length 20 [2022-03-15 22:25:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:41,535 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 85 transitions. [2022-03-15 22:25:41,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 85 transitions. [2022-03-15 22:25:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-15 22:25:41,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:41,535 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:41,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:41,735 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,SelfDestructingSolverStorable12 [2022-03-15 22:25:41,736 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1869449544, now seen corresponding path program 12 times [2022-03-15 22:25:41,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:41,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079987763] [2022-03-15 22:25:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:41,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:41,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:41,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079987763] [2022-03-15 22:25:41,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079987763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:41,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258092148] [2022-03-15 22:25:41,790 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:25:41,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:41,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:41,791 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:41,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 22:25:41,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:25:41,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-15 22:25:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:41,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:41,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258092148] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:41,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:41,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2022-03-15 22:25:41,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1787165869] [2022-03-15 22:25:41,902 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:41,903 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:41,906 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 67 transitions. [2022-03-15 22:25:41,906 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:41,977 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:41,985 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:41,994 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:42,002 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:42,010 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:42,019 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:42,022 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:42,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:25:42,022 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:42,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:25:42,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:25:42,022 INFO L87 Difference]: Start difference. First operand 45 states and 85 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:42,068 INFO L93 Difference]: Finished difference Result 187 states and 349 transitions. [2022-03-15 22:25:42,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:25:42,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-03-15 22:25:42,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:42,069 INFO L225 Difference]: With dead ends: 187 [2022-03-15 22:25:42,069 INFO L226 Difference]: Without dead ends: 172 [2022-03-15 22:25:42,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:25:42,070 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:42,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:42,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-03-15 22:25:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 137. [2022-03-15 22:25:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 2.1029411764705883) internal successors, (286), 136 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 286 transitions. [2022-03-15 22:25:42,073 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 286 transitions. Word has length 21 [2022-03-15 22:25:42,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:42,073 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 286 transitions. [2022-03-15 22:25:42,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:42,073 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 286 transitions. [2022-03-15 22:25:42,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 22:25:42,074 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:42,074 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:42,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-15 22:25:42,290 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,SelfDestructingSolverStorable13 [2022-03-15 22:25:42,290 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1938951913, now seen corresponding path program 13 times [2022-03-15 22:25:42,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:42,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922679549] [2022-03-15 22:25:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:42,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:42,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:42,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:42,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922679549] [2022-03-15 22:25:42,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922679549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:42,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728938581] [2022-03-15 22:25:42,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:25:42,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:42,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:42,451 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:42,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 22:25:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:42,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-15 22:25:42,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:42,531 INFO L387 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 [2022-03-15 22:25:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:42,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:42,570 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:25:42,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:25:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:42,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728938581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:42,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:42,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-03-15 22:25:42,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1590002117] [2022-03-15 22:25:42,608 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:42,609 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:42,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 70 transitions. [2022-03-15 22:25:42,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:42,995 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 7 new interpolants: [4319#(or (= 5 (select queue (+ 6 front))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 4317#(or (= 5 (select queue (+ 6 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 4315#(or (= 5 (select queue (+ 6 front))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 4318#(or (= 5 (select queue (+ 6 front))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 4314#(or (= 5 (select queue (+ 6 front))) (not (= (select queue (+ size front)) 5))), 4316#(or (= 5 (select queue (+ 6 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 4320#(or (not (= 5 (select queue (+ 6 size front)))) (= 5 (select queue (+ 6 front))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:25:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:25:42,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:25:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:25:42,996 INFO L87 Difference]: Start difference. First operand 137 states and 286 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:43,483 INFO L93 Difference]: Finished difference Result 284 states and 544 transitions. [2022-03-15 22:25:43,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:25:43,483 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 22:25:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:43,484 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:25:43,484 INFO L226 Difference]: Without dead ends: 168 [2022-03-15 22:25:43,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:25:43,485 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 145 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:43,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 281 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:25:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-03-15 22:25:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 50. [2022-03-15 22:25:43,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 49 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 95 transitions. [2022-03-15 22:25:43,487 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 95 transitions. Word has length 22 [2022-03-15 22:25:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 95 transitions. [2022-03-15 22:25:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 23 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 95 transitions. [2022-03-15 22:25:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-15 22:25:43,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:43,487 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:43,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:43,688 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,SelfDestructingSolverStorable14 [2022-03-15 22:25:43,688 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:43,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:43,688 INFO L85 PathProgramCache]: Analyzing trace with hash 22055894, now seen corresponding path program 14 times [2022-03-15 22:25:43,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:43,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312837023] [2022-03-15 22:25:43,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:43,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:43,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:43,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312837023] [2022-03-15 22:25:43,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312837023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:43,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583958812] [2022-03-15 22:25:43,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:25:43,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:43,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:43,756 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:43,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 22:25:43,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:25:43,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:43,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-15 22:25:43,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:25:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:43,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:25:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:43,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583958812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:25:43,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:25:43,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2022-03-15 22:25:43,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [631628915] [2022-03-15 22:25:43,871 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:25:43,873 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:25:43,876 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 75 transitions. [2022-03-15 22:25:43,877 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:25:43,948 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:43,956 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:43,965 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:43,974 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:43,984 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:43,992 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:44,000 INFO L387 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 8 treesize of output 4 [2022-03-15 22:25:44,002 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:25:44,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:25:44,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:25:44,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:25:44,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 22:25:44,003 INFO L87 Difference]: Start difference. First operand 50 states and 95 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:44,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:25:44,056 INFO L93 Difference]: Finished difference Result 224 states and 421 transitions. [2022-03-15 22:25:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:25:44,056 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-15 22:25:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:25:44,058 INFO L225 Difference]: With dead ends: 224 [2022-03-15 22:25:44,058 INFO L226 Difference]: Without dead ends: 207 [2022-03-15 22:25:44,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2022-03-15 22:25:44,059 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 52 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:25:44,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 40 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:25:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-15 22:25:44,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 167. [2022-03-15 22:25:44,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.102409638554217) internal successors, (349), 166 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:44,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 349 transitions. [2022-03-15 22:25:44,064 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 349 transitions. Word has length 23 [2022-03-15 22:25:44,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:25:44,064 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 349 transitions. [2022-03-15 22:25:44,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:25:44,064 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 349 transitions. [2022-03-15 22:25:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:25:44,066 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:25:44,066 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:25:44,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 22:25:44,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:44,277 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:25:44,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:25:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1949756021, now seen corresponding path program 15 times [2022-03-15 22:25:44,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:25:44,278 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546340232] [2022-03-15 22:25:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:25:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:25:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:25:44,473 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:25:44,474 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:25:44,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546340232] [2022-03-15 22:25:44,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546340232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:25:44,474 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351233554] [2022-03-15 22:25:44,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:25:44,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:25:44,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:25:44,475 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:25:44,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 22:25:44,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:25:44,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:25:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:25:44,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:12,276 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:26:12,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:26:12,282 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 44 refuted. 25 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:12,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:12,527 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:26:12,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:26:12,560 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:12,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351233554] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:12,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:12,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2022-03-15 22:26:12,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1469868396] [2022-03-15 22:26:12,560 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:12,562 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:12,566 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 78 transitions. [2022-03-15 22:26:12,566 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:13,148 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 8 new interpolants: [5619#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5615#(or (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5620#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5618#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5616#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5617#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5614#(or (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5))), 5621#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 7 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))))] [2022-03-15 22:26:13,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-15 22:26:13,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:13,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-15 22:26:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2138, Unknown=30, NotChecked=0, Total=2550 [2022-03-15 22:26:13,150 INFO L87 Difference]: Start difference. First operand 167 states and 349 transitions. Second operand has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:13,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:13,827 INFO L93 Difference]: Finished difference Result 346 states and 666 transitions. [2022-03-15 22:26:13,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:26:13,827 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:26:13,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:13,828 INFO L225 Difference]: With dead ends: 346 [2022-03-15 22:26:13,828 INFO L226 Difference]: Without dead ends: 206 [2022-03-15 22:26:13,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 28.7s TimeCoverageRelationStatistics Valid=773, Invalid=3619, Unknown=30, NotChecked=0, Total=4422 [2022-03-15 22:26:13,829 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 171 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 364 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-15 22:26:13,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 55. [2022-03-15 22:26:13,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 105 transitions. [2022-03-15 22:26:13,832 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 105 transitions. Word has length 24 [2022-03-15 22:26:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:13,832 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 105 transitions. [2022-03-15 22:26:13,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:13,832 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 105 transitions. [2022-03-15 22:26:13,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-15 22:26:13,832 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:13,832 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:13,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:14,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-15 22:26:14,043 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:14,043 INFO L85 PathProgramCache]: Analyzing trace with hash 312917560, now seen corresponding path program 16 times [2022-03-15 22:26:14,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:14,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582633422] [2022-03-15 22:26:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:14,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:14,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:14,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582633422] [2022-03-15 22:26:14,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582633422] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:14,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811148998] [2022-03-15 22:26:14,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:26:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:14,122 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:14,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 22:26:14,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:26:14,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:14,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-15 22:26:14,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:14,188 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:14,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:14,229 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811148998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:14,229 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:14,229 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2022-03-15 22:26:14,229 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [919604823] [2022-03-15 22:26:14,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:14,231 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:14,235 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 83 transitions. [2022-03-15 22:26:14,235 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:14,309 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,317 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,324 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,332 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,339 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,346 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,353 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,360 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:14,363 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:26:14,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:26:14,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:14,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:26:14,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:26:14,364 INFO L87 Difference]: Start difference. First operand 55 states and 105 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:14,428 INFO L93 Difference]: Finished difference Result 264 states and 499 transitions. [2022-03-15 22:26:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:26:14,428 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-03-15 22:26:14,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:14,429 INFO L225 Difference]: With dead ends: 264 [2022-03-15 22:26:14,429 INFO L226 Difference]: Without dead ends: 245 [2022-03-15 22:26:14,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2022-03-15 22:26:14,430 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:14,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 36 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:14,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-15 22:26:14,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 200. [2022-03-15 22:26:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 2.100502512562814) internal successors, (418), 199 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 418 transitions. [2022-03-15 22:26:14,433 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 418 transitions. Word has length 25 [2022-03-15 22:26:14,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:14,433 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 418 transitions. [2022-03-15 22:26:14,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:14,434 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 418 transitions. [2022-03-15 22:26:14,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 22:26:14,434 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:14,434 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:14,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:14,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-15 22:26:14,643 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:14,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:14,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1701835031, now seen corresponding path program 17 times [2022-03-15 22:26:14,644 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:14,644 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472205585] [2022-03-15 22:26:14,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:14,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:14,878 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:14,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472205585] [2022-03-15 22:26:14,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472205585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:14,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555771819] [2022-03-15 22:26:14,878 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:26:14,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:14,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:14,880 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:14,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 22:26:14,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:26:14,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:14,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 22:26:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:46,048 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:26:46,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:26:46,053 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 54 refuted. 30 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:46,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:46,331 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:26:46,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:26:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:46,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555771819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:46,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:46,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 46 [2022-03-15 22:26:46,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [774842614] [2022-03-15 22:26:46,367 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:46,368 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:46,373 INFO L252 McrAutomatonBuilder]: Finished intersection with 57 states and 86 transitions. [2022-03-15 22:26:46,374 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:47,045 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 9 new interpolants: [7129#(or (= 5 (select queue (+ front 8))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 7130#(or (= 5 (select queue (+ front 8))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 7127#(or (= 5 (select queue (+ front 8))) (not (= (select queue (+ size front)) 5))), 7132#(or (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ front 8))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 7134#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ front 8))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 7133#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ front 8))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 7135#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ front 8))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 7131#(or (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ front 8))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 7128#(or (= 5 (select queue (+ front 8))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:26:47,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-15 22:26:47,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:47,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-15 22:26:47,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=2692, Unknown=32, NotChecked=0, Total=3192 [2022-03-15 22:26:47,047 INFO L87 Difference]: Start difference. First operand 200 states and 418 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:47,859 INFO L93 Difference]: Finished difference Result 414 states and 800 transitions. [2022-03-15 22:26:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:26:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 22:26:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:47,860 INFO L225 Difference]: With dead ends: 414 [2022-03-15 22:26:47,860 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 22:26:47,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=953, Invalid=4565, Unknown=32, NotChecked=0, Total=5550 [2022-03-15 22:26:47,862 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 207 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:47,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 410 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:26:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 22:26:47,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 60. [2022-03-15 22:26:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 59 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 115 transitions. [2022-03-15 22:26:47,871 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 115 transitions. Word has length 26 [2022-03-15 22:26:47,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:47,871 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 115 transitions. [2022-03-15 22:26:47,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 115 transitions. [2022-03-15 22:26:47,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-15 22:26:47,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:47,872 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:47,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:48,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:48,073 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:48,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1217301462, now seen corresponding path program 18 times [2022-03-15 22:26:48,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:48,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379659029] [2022-03-15 22:26:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:48,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:48,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:48,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:48,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379659029] [2022-03-15 22:26:48,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379659029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:48,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553791142] [2022-03-15 22:26:48,151 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:26:48,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:48,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:48,152 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:48,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 22:26:48,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:26:48,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:48,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-15 22:26:48,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:48,247 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:48,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:48,298 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:48,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553791142] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:48,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:48,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 11 [2022-03-15 22:26:48,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1162603049] [2022-03-15 22:26:48,299 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:48,301 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:48,306 INFO L252 McrAutomatonBuilder]: Finished intersection with 60 states and 91 transitions. [2022-03-15 22:26:48,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:48,389 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,397 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,406 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,413 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,421 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,428 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,436 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,443 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,451 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:48,454 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:26:48,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:26:48,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:26:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-15 22:26:48,454 INFO L87 Difference]: Start difference. First operand 60 states and 115 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:48,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:48,513 INFO L93 Difference]: Finished difference Result 307 states and 583 transitions. [2022-03-15 22:26:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:26:48,514 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-03-15 22:26:48,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:48,515 INFO L225 Difference]: With dead ends: 307 [2022-03-15 22:26:48,515 INFO L226 Difference]: Without dead ends: 286 [2022-03-15 22:26:48,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-03-15 22:26:48,515 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:48,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 47 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:48,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-15 22:26:48,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 236. [2022-03-15 22:26:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 2.097872340425532) internal successors, (493), 235 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 493 transitions. [2022-03-15 22:26:48,532 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 493 transitions. Word has length 27 [2022-03-15 22:26:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:48,532 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 493 transitions. [2022-03-15 22:26:48,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 493 transitions. [2022-03-15 22:26:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:26:48,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:48,532 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:48,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:48,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:48,735 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash 232162037, now seen corresponding path program 19 times [2022-03-15 22:26:48,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:48,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917950775] [2022-03-15 22:26:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:49,009 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:49,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:49,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917950775] [2022-03-15 22:26:49,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917950775] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:49,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038972624] [2022-03-15 22:26:49,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:26:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:49,010 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:49,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 22:26:49,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:49,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-15 22:26:49,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:49,115 INFO L387 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 [2022-03-15 22:26:49,120 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:49,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:49,156 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:26:49,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:26:49,197 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:49,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038972624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:49,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:49,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-03-15 22:26:49,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1879034444] [2022-03-15 22:26:49,198 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:49,200 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:49,206 INFO L252 McrAutomatonBuilder]: Finished intersection with 62 states and 94 transitions. [2022-03-15 22:26:49,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:49,895 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 10 new interpolants: [8841#(or (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 8838#(or (= 5 (select queue (+ 9 front))) (not (= (select queue (+ size front)) 5))), 8843#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 8846#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 8842#(or (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 8845#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 8844#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 8847#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 8839#(or (= 5 (select queue (+ 9 front))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 8840#(or (= 5 (select queue (+ 9 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:26:49,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-15 22:26:49,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:49,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-15 22:26:49,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=883, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:26:49,896 INFO L87 Difference]: Start difference. First operand 236 states and 493 transitions. Second operand has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:50,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:50,699 INFO L93 Difference]: Finished difference Result 488 states and 946 transitions. [2022-03-15 22:26:50,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:26:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:26:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:50,700 INFO L225 Difference]: With dead ends: 488 [2022-03-15 22:26:50,700 INFO L226 Difference]: Without dead ends: 294 [2022-03-15 22:26:50,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=498, Invalid=2258, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:26:50,702 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 265 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 862 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:50,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 420 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 862 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:26:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-03-15 22:26:50,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 65. [2022-03-15 22:26:50,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:50,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 125 transitions. [2022-03-15 22:26:50,704 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 125 transitions. Word has length 28 [2022-03-15 22:26:50,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:50,704 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 125 transitions. [2022-03-15 22:26:50,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.125) internal successors, (68), 32 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:50,705 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 125 transitions. [2022-03-15 22:26:50,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-15 22:26:50,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:50,705 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:50,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-15 22:26:50,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:50,917 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:50,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:50,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1392888392, now seen corresponding path program 20 times [2022-03-15 22:26:50,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:50,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941370527] [2022-03-15 22:26:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:50,996 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:50,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:50,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941370527] [2022-03-15 22:26:50,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941370527] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:50,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67927610] [2022-03-15 22:26:50,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:26:50,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:50,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:50,998 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:50,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 22:26:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:26:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:51,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-15 22:26:51,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:26:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:51,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:26:51,160 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:51,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67927610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:26:51,160 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:26:51,160 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 12 [2022-03-15 22:26:51,160 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [970901628] [2022-03-15 22:26:51,160 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:26:51,162 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:26:51,169 INFO L252 McrAutomatonBuilder]: Finished intersection with 65 states and 99 transitions. [2022-03-15 22:26:51,169 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:26:51,297 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,304 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,311 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,318 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,325 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,332 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,339 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,346 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,353 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,360 INFO L387 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 8 treesize of output 4 [2022-03-15 22:26:51,363 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:26:51,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:26:51,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:26:51,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:26:51,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-15 22:26:51,365 INFO L87 Difference]: Start difference. First operand 65 states and 125 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:26:51,428 INFO L93 Difference]: Finished difference Result 353 states and 673 transitions. [2022-03-15 22:26:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:26:51,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-03-15 22:26:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:26:51,429 INFO L225 Difference]: With dead ends: 353 [2022-03-15 22:26:51,429 INFO L226 Difference]: Without dead ends: 330 [2022-03-15 22:26:51,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-03-15 22:26:51,431 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:26:51,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 52 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:26:51,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-15 22:26:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 275. [2022-03-15 22:26:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.0948905109489053) internal successors, (574), 274 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:51,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 574 transitions. [2022-03-15 22:26:51,436 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 574 transitions. Word has length 29 [2022-03-15 22:26:51,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:26:51,436 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 574 transitions. [2022-03-15 22:26:51,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:26:51,437 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 574 transitions. [2022-03-15 22:26:51,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 22:26:51,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:26:51,437 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:26:51,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 22:26:51,652 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,SelfDestructingSolverStorable21 [2022-03-15 22:26:51,653 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:26:51,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:26:51,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1075896599, now seen corresponding path program 21 times [2022-03-15 22:26:51,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:26:51,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966293894] [2022-03-15 22:26:51,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:26:51,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:26:51,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:26:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:26:51,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:26:51,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966293894] [2022-03-15 22:26:51,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966293894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:26:51,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732143172] [2022-03-15 22:26:51,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:26:51,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:26:51,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:26:51,925 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:26:51,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 22:26:51,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 22:26:51,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:26:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-15 22:26:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:32,127 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:27:32,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:27:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 5 proven. 77 refuted. 50 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:32,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:32,531 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:27:32,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:27:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:32,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732143172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:32,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:32,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 56 [2022-03-15 22:27:32,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [422771526] [2022-03-15 22:27:32,575 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:32,577 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:32,584 INFO L252 McrAutomatonBuilder]: Finished intersection with 67 states and 102 transitions. [2022-03-15 22:27:32,585 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:33,609 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 11 new interpolants: [10824#(or (= (select queue (+ front 10)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 10832#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 10831#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 10825#(or (= (select queue (+ front 10)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 10828#(or (not (= 5 (select queue (+ 6 size front)))) (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 10823#(or (= (select queue (+ front 10)) 5) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 10829#(or (not (= 5 (select queue (+ 6 size front)))) (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 10827#(or (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 10826#(or (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 10830#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 10822#(or (= (select queue (+ front 10)) 5) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:27:33,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-15 22:27:33,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-15 22:27:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=3985, Unknown=50, NotChecked=0, Total=4692 [2022-03-15 22:27:33,611 INFO L87 Difference]: Start difference. First operand 275 states and 574 transitions. Second operand has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:34,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:34,742 INFO L93 Difference]: Finished difference Result 568 states and 1104 transitions. [2022-03-15 22:27:34,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:27:34,743 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 22:27:34,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:34,744 INFO L225 Difference]: With dead ends: 568 [2022-03-15 22:27:34,744 INFO L226 Difference]: Without dead ends: 344 [2022-03-15 22:27:34,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 41.9s TimeCoverageRelationStatistics Valid=1360, Invalid=6780, Unknown=50, NotChecked=0, Total=8190 [2022-03-15 22:27:34,745 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 340 mSDsluCounter, 1079 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:34,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 485 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:27:34,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-15 22:27:34,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 70. [2022-03-15 22:27:34,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 69 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:34,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 135 transitions. [2022-03-15 22:27:34,748 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 135 transitions. Word has length 30 [2022-03-15 22:27:34,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:34,748 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 135 transitions. [2022-03-15 22:27:34,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:34,748 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 135 transitions. [2022-03-15 22:27:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-15 22:27:34,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:34,749 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:34,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:34,957 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,SelfDestructingSolverStorable22 [2022-03-15 22:27:34,957 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:34,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1006920746, now seen corresponding path program 22 times [2022-03-15 22:27:34,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:34,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375974058] [2022-03-15 22:27:34,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:34,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:35,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:35,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375974058] [2022-03-15 22:27:35,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375974058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:35,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128642847] [2022-03-15 22:27:35,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:27:35,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:35,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:35,055 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:35,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 22:27:35,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:27:35,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:35,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-15 22:27:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:27:35,137 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:35,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:27:35,185 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 78 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:35,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128642847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:27:35,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:27:35,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 13 [2022-03-15 22:27:35,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1721132323] [2022-03-15 22:27:35,186 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:27:35,188 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:27:35,195 INFO L252 McrAutomatonBuilder]: Finished intersection with 70 states and 107 transitions. [2022-03-15 22:27:35,196 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:27:35,284 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,291 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,297 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,304 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,310 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,317 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,324 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,331 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,338 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,345 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,352 INFO L387 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 8 treesize of output 4 [2022-03-15 22:27:35,354 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:27:35,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:27:35,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:27:35,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:27:35,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-15 22:27:35,355 INFO L87 Difference]: Start difference. First operand 70 states and 135 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:27:35,430 INFO L93 Difference]: Finished difference Result 402 states and 769 transitions. [2022-03-15 22:27:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:27:35,431 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-03-15 22:27:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:27:35,432 INFO L225 Difference]: With dead ends: 402 [2022-03-15 22:27:35,432 INFO L226 Difference]: Without dead ends: 377 [2022-03-15 22:27:35,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2022-03-15 22:27:35,433 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:27:35,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 51 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:27:35,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-03-15 22:27:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 317. [2022-03-15 22:27:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.0917721518987342) internal successors, (661), 316 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 661 transitions. [2022-03-15 22:27:35,441 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 661 transitions. Word has length 31 [2022-03-15 22:27:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:27:35,441 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 661 transitions. [2022-03-15 22:27:35,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:27:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 661 transitions. [2022-03-15 22:27:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:27:35,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:27:35,442 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:27:35,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 22:27:35,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:35,651 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:27:35,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:27:35,652 INFO L85 PathProgramCache]: Analyzing trace with hash 673508213, now seen corresponding path program 23 times [2022-03-15 22:27:35,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:27:35,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197917860] [2022-03-15 22:27:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:27:35,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:27:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:27:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:27:35,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:27:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197917860] [2022-03-15 22:27:35,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197917860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:27:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159371192] [2022-03-15 22:27:35,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:27:35,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:27:35,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:27:35,967 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:27:35,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 22:27:36,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-03-15 22:27:36,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:27:36,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 52 conjunts are in the unsatisfiable core [2022-03-15 22:27:36,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:21,025 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:28:21,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:28:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 9 proven. 90 refuted. 57 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:21,472 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:28:21,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:28:21,531 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:21,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159371192] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:21,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:21,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 61 [2022-03-15 22:28:21,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1014796992] [2022-03-15 22:28:21,532 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:21,534 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:21,542 INFO L252 McrAutomatonBuilder]: Finished intersection with 72 states and 110 transitions. [2022-03-15 22:28:21,542 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:22,705 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 12 new interpolants: [13064#(or (= (select queue (+ front 11)) 5) (not (= (select queue (+ size front)) 5))), 13066#(or (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 13071#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 13073#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 13074#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 13067#(or (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 13075#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 13072#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 13065#(or (= (select queue (+ front 11)) 5) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 13069#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 13068#(or (not (= (select queue (+ size front 4)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 13070#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (= (select queue (+ front 11)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:28:22,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-15 22:28:22,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:22,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-15 22:28:22,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=4720, Unknown=62, NotChecked=0, Total=5550 [2022-03-15 22:28:22,707 INFO L87 Difference]: Start difference. First operand 317 states and 661 transitions. Second operand has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:24,120 INFO L93 Difference]: Finished difference Result 654 states and 1274 transitions. [2022-03-15 22:28:24,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-15 22:28:24,121 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:28:24,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:24,122 INFO L225 Difference]: With dead ends: 654 [2022-03-15 22:28:24,122 INFO L226 Difference]: Without dead ends: 398 [2022-03-15 22:28:24,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 47.0s TimeCoverageRelationStatistics Valid=1595, Invalid=8045, Unknown=62, NotChecked=0, Total=9702 [2022-03-15 22:28:24,124 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 320 mSDsluCounter, 1448 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:24,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 649 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1316 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:28:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-15 22:28:24,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 75. [2022-03-15 22:28:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 145 transitions. [2022-03-15 22:28:24,128 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 145 transitions. Word has length 32 [2022-03-15 22:28:24,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:24,128 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 145 transitions. [2022-03-15 22:28:24,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,128 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 145 transitions. [2022-03-15 22:28:24,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-15 22:28:24,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:24,128 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:24,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:24,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:24,331 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:24,332 INFO L85 PathProgramCache]: Analyzing trace with hash -596058824, now seen corresponding path program 24 times [2022-03-15 22:28:24,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:24,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113496918] [2022-03-15 22:28:24,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:24,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:24,485 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:24,486 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:24,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113496918] [2022-03-15 22:28:24,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113496918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:24,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701498225] [2022-03-15 22:28:24,486 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:28:24,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:24,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:24,487 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:24,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-15 22:28:24,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:28:24,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:24,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-15 22:28:24,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:24,573 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:24,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 91 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:24,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701498225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:24,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:24,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 14 [2022-03-15 22:28:24,631 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [745154743] [2022-03-15 22:28:24,631 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:24,633 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:24,643 INFO L252 McrAutomatonBuilder]: Finished intersection with 75 states and 115 transitions. [2022-03-15 22:28:24,643 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:24,747 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,755 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,767 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,774 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,781 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,790 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,798 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,806 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,813 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,821 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,828 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,836 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:24,839 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:28:24,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:28:24,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:24,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:28:24,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:28:24,839 INFO L87 Difference]: Start difference. First operand 75 states and 145 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:24,909 INFO L93 Difference]: Finished difference Result 454 states and 871 transitions. [2022-03-15 22:28:24,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:28:24,910 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-03-15 22:28:24,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:24,911 INFO L225 Difference]: With dead ends: 454 [2022-03-15 22:28:24,911 INFO L226 Difference]: Without dead ends: 427 [2022-03-15 22:28:24,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:28:24,911 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:24,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 57 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:24,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-15 22:28:24,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 362. [2022-03-15 22:28:24,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.0886426592797784) internal successors, (754), 361 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 754 transitions. [2022-03-15 22:28:24,917 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 754 transitions. Word has length 33 [2022-03-15 22:28:24,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:24,918 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 754 transitions. [2022-03-15 22:28:24,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:24,918 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 754 transitions. [2022-03-15 22:28:24,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-15 22:28:24,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:24,918 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:24,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:25,131 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,SelfDestructingSolverStorable25 [2022-03-15 22:28:25,131 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash -611532521, now seen corresponding path program 25 times [2022-03-15 22:28:25,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:25,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112114670] [2022-03-15 22:28:25,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:25,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:25,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112114670] [2022-03-15 22:28:25,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112114670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:25,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603953398] [2022-03-15 22:28:25,542 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:28:25,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:25,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:25,543 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:25,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-15 22:28:25,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:25,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-15 22:28:25,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:25,673 INFO L387 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 [2022-03-15 22:28:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:25,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:25,713 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:28:25,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:28:25,763 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:25,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603953398] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:25,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:25,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 27 [2022-03-15 22:28:25,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [657755522] [2022-03-15 22:28:25,763 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:25,766 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:25,775 INFO L252 McrAutomatonBuilder]: Finished intersection with 77 states and 118 transitions. [2022-03-15 22:28:25,776 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:26,878 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 13 new interpolants: [15551#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 15541#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 15542#(or (= (select queue (+ front 12)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 15540#(or (= (select queue (+ front 12)) 5) (not (= (select queue (+ size front)) 5))), 15547#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 15550#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 15549#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 15548#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 15544#(or (= (select queue (+ front 12)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 15543#(or (= (select queue (+ front 12)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 15546#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 15552#(or (= (select queue (+ front 12)) 5) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 15545#(or (= (select queue (+ front 12)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:28:26,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-15 22:28:26,879 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:26,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-15 22:28:26,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1459, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:28:26,880 INFO L87 Difference]: Start difference. First operand 362 states and 754 transitions. Second operand has 42 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:28,193 INFO L93 Difference]: Finished difference Result 746 states and 1456 transitions. [2022-03-15 22:28:28,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-15 22:28:28,193 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-03-15 22:28:28,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:28,194 INFO L225 Difference]: With dead ends: 746 [2022-03-15 22:28:28,195 INFO L226 Difference]: Without dead ends: 456 [2022-03-15 22:28:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=783, Invalid=3773, Unknown=0, NotChecked=0, Total=4556 [2022-03-15 22:28:28,195 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 407 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 1477 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 1624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 1477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 695 Invalid, 1624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 1477 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-15 22:28:28,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-03-15 22:28:28,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 80. [2022-03-15 22:28:28,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 79 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 155 transitions. [2022-03-15 22:28:28,199 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 155 transitions. Word has length 34 [2022-03-15 22:28:28,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:28,199 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 155 transitions. [2022-03-15 22:28:28,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.097560975609756) internal successors, (86), 41 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,199 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 155 transitions. [2022-03-15 22:28:28,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-15 22:28:28,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:28,199 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:28,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:28,415 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,SelfDestructingSolverStorable26 [2022-03-15 22:28:28,415 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:28,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:28,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1777615914, now seen corresponding path program 26 times [2022-03-15 22:28:28,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:28,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383408808] [2022-03-15 22:28:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:28,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:28,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383408808] [2022-03-15 22:28:28,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383408808] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:28,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710650074] [2022-03-15 22:28:28,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:28:28,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:28,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:28,534 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:28,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-15 22:28:28,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:28:28,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:28,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-15 22:28:28,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:28,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 105 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:28,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710650074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:28,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:28,685 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2022-03-15 22:28:28,685 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [833052111] [2022-03-15 22:28:28,685 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:28,688 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:28,698 INFO L252 McrAutomatonBuilder]: Finished intersection with 80 states and 123 transitions. [2022-03-15 22:28:28,699 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:28,810 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,819 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,828 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,835 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,845 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,851 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,858 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,864 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,871 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,880 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,887 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,894 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,901 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:28,903 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:28:28,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:28:28,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:28:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-15 22:28:28,904 INFO L87 Difference]: Start difference. First operand 80 states and 155 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:28,983 INFO L93 Difference]: Finished difference Result 509 states and 979 transitions. [2022-03-15 22:28:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:28:28,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-03-15 22:28:28,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:28,984 INFO L225 Difference]: With dead ends: 509 [2022-03-15 22:28:28,984 INFO L226 Difference]: Without dead ends: 480 [2022-03-15 22:28:28,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-03-15 22:28:28,985 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 84 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:28,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 67 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-03-15 22:28:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 410. [2022-03-15 22:28:28,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.0855745721271393) internal successors, (853), 409 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 853 transitions. [2022-03-15 22:28:28,991 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 853 transitions. Word has length 35 [2022-03-15 22:28:28,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:28,991 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 853 transitions. [2022-03-15 22:28:28,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 853 transitions. [2022-03-15 22:28:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-15 22:28:28,991 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:28,991 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:29,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:29,207 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,SelfDestructingSolverStorable27 [2022-03-15 22:28:29,207 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:29,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:29,208 INFO L85 PathProgramCache]: Analyzing trace with hash 532030453, now seen corresponding path program 27 times [2022-03-15 22:28:29,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:29,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759182620] [2022-03-15 22:28:29,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:29,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:29,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:29,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759182620] [2022-03-15 22:28:29,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759182620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:29,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859526761] [2022-03-15 22:28:29,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:28:29,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:29,601 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:29,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-15 22:28:29,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-03-15 22:28:29,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:29,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:28:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:29,730 INFO L387 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 [2022-03-15 22:28:29,734 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:29,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:29,770 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:28:29,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:28:29,829 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:29,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859526761] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:29,830 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:29,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 29 [2022-03-15 22:28:29,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1436308371] [2022-03-15 22:28:29,830 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:29,833 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:29,844 INFO L252 McrAutomatonBuilder]: Finished intersection with 82 states and 126 transitions. [2022-03-15 22:28:29,844 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:31,117 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 14 new interpolants: [18310#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 18301#(or (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18313#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 18308#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 18311#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 18312#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 18302#(or (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18309#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 18303#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18304#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18305#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18314#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 18306#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5))), 18307#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 13))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:28:31,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-15 22:28:31,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:31,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-15 22:28:31,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1683, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:28:31,118 INFO L87 Difference]: Start difference. First operand 410 states and 853 transitions. Second operand has 45 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:32,656 INFO L93 Difference]: Finished difference Result 844 states and 1650 transitions. [2022-03-15 22:28:32,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-15 22:28:32,656 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-03-15 22:28:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:32,658 INFO L225 Difference]: With dead ends: 844 [2022-03-15 22:28:32,658 INFO L226 Difference]: Without dead ends: 518 [2022-03-15 22:28:32,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=892, Invalid=4364, Unknown=0, NotChecked=0, Total=5256 [2022-03-15 22:28:32,659 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 423 mSDsluCounter, 1896 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:32,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 837 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 22:28:32,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-03-15 22:28:32,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 85. [2022-03-15 22:28:32,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:32,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 165 transitions. [2022-03-15 22:28:32,662 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 165 transitions. Word has length 36 [2022-03-15 22:28:32,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:32,662 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 165 transitions. [2022-03-15 22:28:32,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.090909090909091) internal successors, (92), 44 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:32,662 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 165 transitions. [2022-03-15 22:28:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-15 22:28:32,663 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:32,663 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:32,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:32,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-15 22:28:32,875 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:32,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:32,876 INFO L85 PathProgramCache]: Analyzing trace with hash -686902088, now seen corresponding path program 28 times [2022-03-15 22:28:32,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:32,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242351363] [2022-03-15 22:28:32,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:32,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:33,006 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:33,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:33,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242351363] [2022-03-15 22:28:33,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242351363] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:33,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758945949] [2022-03-15 22:28:33,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:28:33,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:33,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:33,008 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:33,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-15 22:28:33,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:28:33,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:33,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-15 22:28:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:28:33,093 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:33,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:28:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:33,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758945949] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:28:33,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:28:33,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 16 [2022-03-15 22:28:33,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1420672202] [2022-03-15 22:28:33,149 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:28:33,152 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:28:33,172 INFO L252 McrAutomatonBuilder]: Finished intersection with 85 states and 131 transitions. [2022-03-15 22:28:33,172 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:28:33,279 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,287 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,294 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,301 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,307 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,314 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,324 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,331 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,339 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,346 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,353 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,359 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,367 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,373 INFO L387 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 8 treesize of output 4 [2022-03-15 22:28:33,376 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:28:33,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:28:33,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:28:33,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:28:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-15 22:28:33,377 INFO L87 Difference]: Start difference. First operand 85 states and 165 transitions. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:33,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:28:33,453 INFO L93 Difference]: Finished difference Result 567 states and 1093 transitions. [2022-03-15 22:28:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:28:33,453 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-03-15 22:28:33,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:28:33,455 INFO L225 Difference]: With dead ends: 567 [2022-03-15 22:28:33,455 INFO L226 Difference]: Without dead ends: 536 [2022-03-15 22:28:33,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-03-15 22:28:33,455 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 148 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:28:33,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 69 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:28:33,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-03-15 22:28:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 461. [2022-03-15 22:28:33,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.082608695652174) internal successors, (958), 460 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:33,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 958 transitions. [2022-03-15 22:28:33,461 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 958 transitions. Word has length 37 [2022-03-15 22:28:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:28:33,462 INFO L470 AbstractCegarLoop]: Abstraction has 461 states and 958 transitions. [2022-03-15 22:28:33,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 16 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:28:33,462 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 958 transitions. [2022-03-15 22:28:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-15 22:28:33,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:28:33,462 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:28:33,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-15 22:28:33,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:33,679 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:28:33,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:28:33,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1614835433, now seen corresponding path program 29 times [2022-03-15 22:28:33,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:28:33,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498896910] [2022-03-15 22:28:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:28:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:28:33,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:28:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:28:34,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:28:34,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498896910] [2022-03-15 22:28:34,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498896910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:28:34,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700923539] [2022-03-15 22:28:34,110 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:28:34,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:28:34,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:28:34,111 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:28:34,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-15 22:28:34,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 22:28:34,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:28:34,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-15 22:28:34,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:29:51,636 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:29:51,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:29:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 11 proven. 135 refuted. 94 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:51,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:29:52,278 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:29:52,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:29:52,333 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:52,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700923539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:29:52,333 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:29:52,333 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 76 [2022-03-15 22:29:52,333 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [902098763] [2022-03-15 22:29:52,333 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:29:52,337 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:29:52,355 INFO L252 McrAutomatonBuilder]: Finished intersection with 87 states and 134 transitions. [2022-03-15 22:29:52,355 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:29:54,177 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 15 new interpolants: [21413#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21415#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front))))), 21410#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21419#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 21421#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 21407#(or (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21416#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front))))), 21412#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21408#(or (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21414#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front))))), 21418#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 21417#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 21409#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5)), 21420#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 21411#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (= (select queue (+ 14 front)) 5))] [2022-03-15 22:29:54,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-15 22:29:54,177 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:29:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-15 22:29:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1139, Invalid=7319, Unknown=98, NotChecked=0, Total=8556 [2022-03-15 22:29:54,178 INFO L87 Difference]: Start difference. First operand 461 states and 958 transitions. Second operand has 48 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:56,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:29:56,228 INFO L93 Difference]: Finished difference Result 948 states and 1856 transitions. [2022-03-15 22:29:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-15 22:29:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-03-15 22:29:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:29:56,230 INFO L225 Difference]: With dead ends: 948 [2022-03-15 22:29:56,230 INFO L226 Difference]: Without dead ends: 584 [2022-03-15 22:29:56,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2291 ImplicationChecksByTransitivity, 80.7s TimeCoverageRelationStatistics Valid=2398, Invalid=12510, Unknown=98, NotChecked=0, Total=15006 [2022-03-15 22:29:56,232 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 488 mSDsluCounter, 2031 mSDsCounter, 0 mSdLazyCounter, 1853 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 1853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-15 22:29:56,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 903 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 1853 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-15 22:29:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-03-15 22:29:56,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 90. [2022-03-15 22:29:56,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 89 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 175 transitions. [2022-03-15 22:29:56,237 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 175 transitions. Word has length 38 [2022-03-15 22:29:56,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:29:56,237 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 175 transitions. [2022-03-15 22:29:56,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.0851063829787235) internal successors, (98), 47 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:56,237 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 175 transitions. [2022-03-15 22:29:56,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-15 22:29:56,238 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:29:56,238 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:29:56,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-03-15 22:29:56,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:29:56,444 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:29:56,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:29:56,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1479732182, now seen corresponding path program 30 times [2022-03-15 22:29:56,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:29:56,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912519029] [2022-03-15 22:29:56,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:29:56,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:29:56,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:29:56,590 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:56,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:29:56,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912519029] [2022-03-15 22:29:56,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912519029] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:29:56,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538215203] [2022-03-15 22:29:56,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:29:56,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:29:56,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:29:56,592 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:29:56,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-15 22:29:56,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 22:29:56,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:29:56,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-15 22:29:56,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:29:56,691 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:56,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:29:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 136 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:56,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538215203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:29:56,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:29:56,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 17 [2022-03-15 22:29:56,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [338509580] [2022-03-15 22:29:56,749 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:29:56,753 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:29:56,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 90 states and 139 transitions. [2022-03-15 22:29:56,767 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:29:56,878 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,885 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,892 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,898 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,905 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,912 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,919 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,926 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,933 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,940 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,946 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,955 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,962 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,969 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,978 INFO L387 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 8 treesize of output 4 [2022-03-15 22:29:56,981 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:29:56,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:29:56,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:29:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:29:56,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:29:56,982 INFO L87 Difference]: Start difference. First operand 90 states and 175 transitions. Second operand has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:57,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:29:57,065 INFO L93 Difference]: Finished difference Result 628 states and 1213 transitions. [2022-03-15 22:29:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:29:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-03-15 22:29:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:29:57,067 INFO L225 Difference]: With dead ends: 628 [2022-03-15 22:29:57,067 INFO L226 Difference]: Without dead ends: 595 [2022-03-15 22:29:57,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:29:57,067 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 118 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:29:57,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 80 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:29:57,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-03-15 22:29:57,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 515. [2022-03-15 22:29:57,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.0797665369649807) internal successors, (1069), 514 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:57,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1069 transitions. [2022-03-15 22:29:57,074 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1069 transitions. Word has length 39 [2022-03-15 22:29:57,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:29:57,074 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1069 transitions. [2022-03-15 22:29:57,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.777777777777778) internal successors, (86), 17 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:29:57,074 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1069 transitions. [2022-03-15 22:29:57,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-15 22:29:57,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:29:57,075 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:29:57,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-15 22:29:57,292 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,SelfDestructingSolverStorable31 [2022-03-15 22:29:57,292 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:29:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:29:57,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1205982091, now seen corresponding path program 31 times [2022-03-15 22:29:57,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:29:57,294 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654817881] [2022-03-15 22:29:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:29:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:29:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:29:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:57,782 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:29:57,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654817881] [2022-03-15 22:29:57,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654817881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:29:57,782 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272616061] [2022-03-15 22:29:57,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:29:57,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:29:57,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:29:57,783 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:29:57,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-15 22:29:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:29:57,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-15 22:29:57,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:29:57,921 INFO L387 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 [2022-03-15 22:29:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:57,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:29:57,965 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:29:57,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:29:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:29:58,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272616061] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:29:58,027 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:29:58,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 33 [2022-03-15 22:29:58,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [809091852] [2022-03-15 22:29:58,027 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:29:58,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:29:58,047 INFO L252 McrAutomatonBuilder]: Finished intersection with 92 states and 142 transitions. [2022-03-15 22:29:58,047 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:29:59,672 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 16 new interpolants: [24789#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 24792#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 24796#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 24787#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 24786#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 24788#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 24798#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 24793#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 24783#(or (= 5 (select queue (+ front 15))) (not (= (select queue (+ size front)) 5))), 24797#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 24790#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 24791#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 24784#(or (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ size front)) 5))), 24785#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ size front)) 5))), 24794#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 24795#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 15))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10)))))] [2022-03-15 22:29:59,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-15 22:29:59,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:29:59,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-15 22:29:59,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:29:59,673 INFO L87 Difference]: Start difference. First operand 515 states and 1069 transitions. Second operand has 51 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:01,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:30:01,594 INFO L93 Difference]: Finished difference Result 1058 states and 2074 transitions. [2022-03-15 22:30:01,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-15 22:30:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-03-15 22:30:01,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:30:01,596 INFO L225 Difference]: With dead ends: 1058 [2022-03-15 22:30:01,596 INFO L226 Difference]: Without dead ends: 654 [2022-03-15 22:30:01,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1131, Invalid=5675, Unknown=0, NotChecked=0, Total=6806 [2022-03-15 22:30:01,597 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 527 mSDsluCounter, 2244 mSDsCounter, 0 mSdLazyCounter, 2060 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 2258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 2060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 22:30:01,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 993 Invalid, 2258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 2060 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 22:30:01,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2022-03-15 22:30:01,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 95. [2022-03-15 22:30:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:01,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 185 transitions. [2022-03-15 22:30:01,601 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 185 transitions. Word has length 40 [2022-03-15 22:30:01,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:30:01,601 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 185 transitions. [2022-03-15 22:30:01,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.08) internal successors, (104), 50 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:01,601 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 185 transitions. [2022-03-15 22:30:01,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-15 22:30:01,601 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:30:01,601 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:30:01,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-15 22:30:01,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:01,815 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:30:01,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:30:01,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1269283896, now seen corresponding path program 32 times [2022-03-15 22:30:01,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:30:01,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237444033] [2022-03-15 22:30:01,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:30:01,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:30:01,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:30:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:01,965 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:30:01,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237444033] [2022-03-15 22:30:01,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237444033] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:30:01,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787096147] [2022-03-15 22:30:01,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:30:01,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:01,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:30:01,968 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:30:01,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-15 22:30:02,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:30:02,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:30:02,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:30:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:30:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:02,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:30:02,179 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 153 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:02,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787096147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:30:02,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:30:02,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 18 [2022-03-15 22:30:02,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [570544708] [2022-03-15 22:30:02,180 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:30:02,194 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:30:02,212 INFO L252 McrAutomatonBuilder]: Finished intersection with 95 states and 147 transitions. [2022-03-15 22:30:02,212 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:30:02,340 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,347 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,354 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,361 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,368 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,375 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,382 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,389 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,396 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,403 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,410 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,417 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,424 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,431 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,438 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,445 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:02,447 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:30:02,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:30:02,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:30:02,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:30:02,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:30:02,448 INFO L87 Difference]: Start difference. First operand 95 states and 185 transitions. Second operand has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:30:02,545 INFO L93 Difference]: Finished difference Result 692 states and 1339 transitions. [2022-03-15 22:30:02,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:30:02,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-03-15 22:30:02,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:30:02,547 INFO L225 Difference]: With dead ends: 692 [2022-03-15 22:30:02,547 INFO L226 Difference]: Without dead ends: 657 [2022-03-15 22:30:02,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:30:02,547 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 118 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:30:02,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 84 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:30:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-15 22:30:02,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 572. [2022-03-15 22:30:02,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.0770577933450087) internal successors, (1186), 571 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:02,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1186 transitions. [2022-03-15 22:30:02,555 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1186 transitions. Word has length 41 [2022-03-15 22:30:02,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:30:02,555 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1186 transitions. [2022-03-15 22:30:02,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.7894736842105265) internal successors, (91), 18 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:02,555 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1186 transitions. [2022-03-15 22:30:02,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-15 22:30:02,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:30:02,556 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:30:02,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 22:30:02,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:02,763 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:30:02,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:30:02,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1573212439, now seen corresponding path program 33 times [2022-03-15 22:30:02,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:30:02,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939416960] [2022-03-15 22:30:02,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:30:02,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:30:02,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:30:03,293 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:03,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:30:03,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939416960] [2022-03-15 22:30:03,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939416960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:30:03,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718714848] [2022-03-15 22:30:03,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:30:03,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:03,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:30:03,295 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:30:03,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-15 22:30:03,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-15 22:30:03,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:30:03,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:30:03,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:30:03,459 INFO L387 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 [2022-03-15 22:30:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:03,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:30:03,521 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:30:03,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:30:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:03,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718714848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:30:03,588 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:30:03,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2022-03-15 22:30:03,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [509685389] [2022-03-15 22:30:03,589 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:30:03,592 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:30:03,612 INFO L252 McrAutomatonBuilder]: Finished intersection with 97 states and 150 transitions. [2022-03-15 22:30:03,612 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:30:05,514 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 17 new interpolants: [28503#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28496#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 28500#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28497#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 28494#(or (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 28495#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 28492#(or (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 28501#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28504#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28489#(or (= 5 (select queue (+ 16 front))) (not (= (select queue (+ size front)) 5))), 28505#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28498#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 28502#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28491#(or (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 28493#(or (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 28499#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (= 5 (select queue (+ 16 front))) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 28490#(or (= 5 (select queue (+ 16 front))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:30:05,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-15 22:30:05,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:30:05,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-15 22:30:05,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=2451, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:30:05,516 INFO L87 Difference]: Start difference. First operand 572 states and 1186 transitions. Second operand has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:30:07,681 INFO L93 Difference]: Finished difference Result 1174 states and 2304 transitions. [2022-03-15 22:30:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-15 22:30:07,681 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-03-15 22:30:07,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:30:07,683 INFO L225 Difference]: With dead ends: 1174 [2022-03-15 22:30:07,683 INFO L226 Difference]: Without dead ends: 728 [2022-03-15 22:30:07,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1261, Invalid=6395, Unknown=0, NotChecked=0, Total=7656 [2022-03-15 22:30:07,684 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 665 mSDsluCounter, 2250 mSDsCounter, 0 mSdLazyCounter, 2125 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-15 22:30:07,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 990 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2125 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-15 22:30:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-03-15 22:30:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 100. [2022-03-15 22:30:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 99 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:07,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 195 transitions. [2022-03-15 22:30:07,688 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 195 transitions. Word has length 42 [2022-03-15 22:30:07,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:30:07,688 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 195 transitions. [2022-03-15 22:30:07,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 2.0754716981132075) internal successors, (110), 53 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:07,688 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 195 transitions. [2022-03-15 22:30:07,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-15 22:30:07,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:30:07,689 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:30:07,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-15 22:30:07,891 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,SelfDestructingSolverStorable34 [2022-03-15 22:30:07,891 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:30:07,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:30:07,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1524968406, now seen corresponding path program 34 times [2022-03-15 22:30:07,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:30:07,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219112944] [2022-03-15 22:30:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:30:07,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:30:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:30:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:08,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:30:08,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219112944] [2022-03-15 22:30:08,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219112944] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:30:08,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256305171] [2022-03-15 22:30:08,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:30:08,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:08,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:30:08,053 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:30:08,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-15 22:30:08,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:30:08,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:30:08,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:30:08,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:30:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:08,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:30:08,230 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 171 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:08,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256305171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:30:08,230 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:30:08,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 19 [2022-03-15 22:30:08,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [994661755] [2022-03-15 22:30:08,231 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:30:08,237 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:30:08,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 100 states and 155 transitions. [2022-03-15 22:30:08,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:30:08,392 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,399 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,406 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,416 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,425 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,432 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,448 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,457 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,466 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,474 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,483 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,490 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,497 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,504 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,511 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,518 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,525 INFO L387 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 8 treesize of output 4 [2022-03-15 22:30:08,527 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:30:08,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:30:08,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:30:08,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:30:08,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-15 22:30:08,528 INFO L87 Difference]: Start difference. First operand 100 states and 195 transitions. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:08,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:30:08,622 INFO L93 Difference]: Finished difference Result 759 states and 1471 transitions. [2022-03-15 22:30:08,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:30:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-03-15 22:30:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:30:08,624 INFO L225 Difference]: With dead ends: 759 [2022-03-15 22:30:08,624 INFO L226 Difference]: Without dead ends: 722 [2022-03-15 22:30:08,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2022-03-15 22:30:08,625 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 202 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:30:08,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 75 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:30:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2022-03-15 22:30:08,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 632. [2022-03-15 22:30:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 631 states have (on average 2.074484944532488) internal successors, (1309), 631 states have internal predecessors, (1309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 1309 transitions. [2022-03-15 22:30:08,633 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 1309 transitions. Word has length 43 [2022-03-15 22:30:08,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:30:08,633 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 1309 transitions. [2022-03-15 22:30:08,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 19 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:30:08,633 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 1309 transitions. [2022-03-15 22:30:08,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-15 22:30:08,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:30:08,634 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:30:08,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-15 22:30:08,850 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,SelfDestructingSolverStorable35 [2022-03-15 22:30:08,850 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:30:08,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:30:08,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1542522101, now seen corresponding path program 35 times [2022-03-15 22:30:08,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:30:08,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328807672] [2022-03-15 22:30:08,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:30:08,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:30:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:30:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:30:09,489 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:30:09,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328807672] [2022-03-15 22:30:09,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328807672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:30:09,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416103349] [2022-03-15 22:30:09,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:30:09,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:30:09,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:30:09,491 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:30:09,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-15 22:30:09,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-03-15 22:30:09,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:30:09,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-15 22:30:09,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:31:44,744 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:31:44,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:31:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 19 proven. 189 refuted. 134 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:44,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:31:45,604 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:31:45,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:31:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:45,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416103349] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:31:45,668 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:31:45,668 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 91 [2022-03-15 22:31:45,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [583290090] [2022-03-15 22:31:45,668 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:31:45,671 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:31:45,692 INFO L252 McrAutomatonBuilder]: Finished intersection with 102 states and 158 transitions. [2022-03-15 22:31:45,692 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:31:48,265 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 18 new interpolants: [32602#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 32594#(or (= 5 (select queue (+ front 17))) (not (= (select queue (+ size front)) 5))), 32607#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32611#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32597#(or (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 32598#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 32606#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32604#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32609#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32610#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32605#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32595#(or (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 32600#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 32608#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 32603#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 32599#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 32596#(or (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 32601#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 17))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))))] [2022-03-15 22:31:48,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-15 22:31:48,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:31:48,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-15 22:31:48,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1588, Invalid=10483, Unknown=139, NotChecked=0, Total=12210 [2022-03-15 22:31:48,266 INFO L87 Difference]: Start difference. First operand 632 states and 1309 transitions. Second operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:51,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:31:51,187 INFO L93 Difference]: Finished difference Result 1296 states and 2546 transitions. [2022-03-15 22:31:51,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-15 22:31:51,187 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-03-15 22:31:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:31:51,190 INFO L225 Difference]: With dead ends: 1296 [2022-03-15 22:31:51,190 INFO L226 Difference]: Without dead ends: 806 [2022-03-15 22:31:51,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 100.1s TimeCoverageRelationStatistics Valid=3369, Invalid=17954, Unknown=139, NotChecked=0, Total=21462 [2022-03-15 22:31:51,191 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 637 mSDsluCounter, 2538 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-15 22:31:51,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 1113 Invalid, 2627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-15 22:31:51,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 806 states. [2022-03-15 22:31:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 806 to 105. [2022-03-15 22:31:51,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 104 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 205 transitions. [2022-03-15 22:31:51,194 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 205 transitions. Word has length 44 [2022-03-15 22:31:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:31:51,195 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 205 transitions. [2022-03-15 22:31:51,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 205 transitions. [2022-03-15 22:31:51,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-15 22:31:51,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:31:51,195 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:31:51,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-15 22:31:51,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-15 22:31:51,400 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:31:51,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:31:51,401 INFO L85 PathProgramCache]: Analyzing trace with hash 573567928, now seen corresponding path program 36 times [2022-03-15 22:31:51,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:31:51,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811344253] [2022-03-15 22:31:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:31:51,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:31:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:31:51,584 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:51,584 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:31:51,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811344253] [2022-03-15 22:31:51,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811344253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:31:51,584 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795427578] [2022-03-15 22:31:51,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:31:51,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:31:51,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:31:51,586 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:31:51,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-15 22:31:51,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-03-15 22:31:51,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:31:51,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 38 conjunts are in the unsatisfiable core [2022-03-15 22:31:51,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:31:51,697 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:51,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:31:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:51,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795427578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:31:51,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:31:51,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 20 [2022-03-15 22:31:51,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [822457170] [2022-03-15 22:31:51,760 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:31:51,764 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:31:51,784 INFO L252 McrAutomatonBuilder]: Finished intersection with 105 states and 163 transitions. [2022-03-15 22:31:51,784 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:31:51,925 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,931 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,939 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,945 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,951 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,957 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,964 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,971 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,977 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,983 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,989 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:51,995 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,002 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,010 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,016 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,022 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,028 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,034 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:52,037 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:31:52,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:31:52,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:31:52,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:31:52,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-15 22:31:52,037 INFO L87 Difference]: Start difference. First operand 105 states and 205 transitions. Second operand has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:52,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:31:52,134 INFO L93 Difference]: Finished difference Result 829 states and 1609 transitions. [2022-03-15 22:31:52,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:31:52,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-03-15 22:31:52,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:31:52,136 INFO L225 Difference]: With dead ends: 829 [2022-03-15 22:31:52,136 INFO L226 Difference]: Without dead ends: 790 [2022-03-15 22:31:52,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2022-03-15 22:31:52,137 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:31:52,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 103 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:31:52,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-03-15 22:31:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 695. [2022-03-15 22:31:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 695 states, 694 states have (on average 2.0720461095100866) internal successors, (1438), 694 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 695 states to 695 states and 1438 transitions. [2022-03-15 22:31:52,144 INFO L78 Accepts]: Start accepts. Automaton has 695 states and 1438 transitions. Word has length 45 [2022-03-15 22:31:52,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:31:52,144 INFO L470 AbstractCegarLoop]: Abstraction has 695 states and 1438 transitions. [2022-03-15 22:31:52,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.809523809523809) internal successors, (101), 20 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 695 states and 1438 transitions. [2022-03-15 22:31:52,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-15 22:31:52,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:31:52,145 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:31:52,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 22:31:52,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:31:52,361 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:31:52,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:31:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 262799639, now seen corresponding path program 37 times [2022-03-15 22:31:52,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:31:52,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086763692] [2022-03-15 22:31:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:31:52,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:31:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:31:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:53,070 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:31:53,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086763692] [2022-03-15 22:31:53,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086763692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:31:53,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746632205] [2022-03-15 22:31:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:31:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:31:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:31:53,071 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:31:53,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-15 22:31:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:31:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-15 22:31:53,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:31:53,230 INFO L387 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 [2022-03-15 22:31:53,234 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:53,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:31:53,279 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:31:53,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:31:53,357 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:53,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746632205] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:31:53,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:31:53,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 39 [2022-03-15 22:31:53,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1328906968] [2022-03-15 22:31:53,357 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:31:53,365 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:31:53,394 INFO L252 McrAutomatonBuilder]: Finished intersection with 107 states and 166 transitions. [2022-03-15 22:31:53,394 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:31:55,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 19 new interpolants: [37006#(or (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 37011#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 37005#(or (= 5 (select queue (+ front 18))) (not (= (select queue (+ size front)) 5))), 37020#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37007#(or (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 37021#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37008#(or (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 37023#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37015#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37013#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 37009#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 37017#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37010#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 37016#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37018#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37022#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37012#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 37019#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 37014#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (= 5 (select queue (+ front 18))) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))))] [2022-03-15 22:31:55,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-15 22:31:55,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:31:55,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-15 22:31:55,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=497, Invalid=3043, Unknown=0, NotChecked=0, Total=3540 [2022-03-15 22:31:55,899 INFO L87 Difference]: Start difference. First operand 695 states and 1438 transitions. Second operand has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:58,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:31:58,633 INFO L93 Difference]: Finished difference Result 1424 states and 2800 transitions. [2022-03-15 22:31:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-15 22:31:58,633 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-03-15 22:31:58,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:31:58,636 INFO L225 Difference]: With dead ends: 1424 [2022-03-15 22:31:58,636 INFO L226 Difference]: Without dead ends: 888 [2022-03-15 22:31:58,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1542, Invalid=7964, Unknown=0, NotChecked=0, Total=9506 [2022-03-15 22:31:58,637 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 678 mSDsluCounter, 3167 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 3151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:31:58,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [678 Valid, 1392 Invalid, 3151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 22:31:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-03-15 22:31:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 110. [2022-03-15 22:31:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 109 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 215 transitions. [2022-03-15 22:31:58,641 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 215 transitions. Word has length 46 [2022-03-15 22:31:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:31:58,641 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 215 transitions. [2022-03-15 22:31:58,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.0677966101694913) internal successors, (122), 59 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 215 transitions. [2022-03-15 22:31:58,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-15 22:31:58,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:31:58,641 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:31:58,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-15 22:31:58,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 22:31:58,855 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:31:58,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:31:58,855 INFO L85 PathProgramCache]: Analyzing trace with hash -443122730, now seen corresponding path program 38 times [2022-03-15 22:31:58,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:31:58,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593858632] [2022-03-15 22:31:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:31:58,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:31:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:31:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:59,038 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:31:59,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593858632] [2022-03-15 22:31:59,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593858632] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:31:59,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268749051] [2022-03-15 22:31:59,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:31:59,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:31:59,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:31:59,040 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:31:59,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-15 22:31:59,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:31:59,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:31:59,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-15 22:31:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:31:59,144 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:59,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:31:59,214 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 210 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:31:59,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268749051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:31:59,215 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:31:59,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 21 [2022-03-15 22:31:59,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2061968569] [2022-03-15 22:31:59,215 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:31:59,219 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:31:59,245 INFO L252 McrAutomatonBuilder]: Finished intersection with 110 states and 171 transitions. [2022-03-15 22:31:59,245 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:31:59,386 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,393 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,400 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,407 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,413 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,420 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,430 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,437 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,445 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,452 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,459 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,466 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,473 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,480 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,487 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,493 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,500 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,507 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,514 INFO L387 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 8 treesize of output 4 [2022-03-15 22:31:59,516 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:31:59,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-15 22:31:59,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:31:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-15 22:31:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-15 22:31:59,517 INFO L87 Difference]: Start difference. First operand 110 states and 215 transitions. Second operand has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:31:59,622 INFO L93 Difference]: Finished difference Result 902 states and 1753 transitions. [2022-03-15 22:31:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:31:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-03-15 22:31:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:31:59,625 INFO L225 Difference]: With dead ends: 902 [2022-03-15 22:31:59,625 INFO L226 Difference]: Without dead ends: 861 [2022-03-15 22:31:59,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-03-15 22:31:59,626 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 150 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:31:59,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 93 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:31:59,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 861 states. [2022-03-15 22:31:59,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 861 to 761. [2022-03-15 22:31:59,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 761 states, 760 states have (on average 2.069736842105263) internal successors, (1573), 760 states have internal predecessors, (1573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:59,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 761 states to 761 states and 1573 transitions. [2022-03-15 22:31:59,635 INFO L78 Accepts]: Start accepts. Automaton has 761 states and 1573 transitions. Word has length 47 [2022-03-15 22:31:59,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:31:59,635 INFO L470 AbstractCegarLoop]: Abstraction has 761 states and 1573 transitions. [2022-03-15 22:31:59,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.818181818181818) internal successors, (106), 21 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:31:59,635 INFO L276 IsEmpty]: Start isEmpty. Operand 761 states and 1573 transitions. [2022-03-15 22:31:59,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-15 22:31:59,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:31:59,636 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:31:59,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-15 22:31:59,852 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,SelfDestructingSolverStorable39 [2022-03-15 22:31:59,853 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:31:59,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:31:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1556262261, now seen corresponding path program 39 times [2022-03-15 22:31:59,854 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:31:59,854 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643688829] [2022-03-15 22:31:59,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:31:59,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:31:59,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:32:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:32:00,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:32:00,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643688829] [2022-03-15 22:32:00,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643688829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:32:00,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166365317] [2022-03-15 22:32:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:32:00,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:32:00,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:32:00,547 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:32:00,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-15 22:32:00,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-15 22:32:00,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:32:00,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-15 22:32:00,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:34:36,035 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:34:36,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:34:36,039 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 10 proven. 230 refuted. 180 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:36,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:34:37,058 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:34:37,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:34:37,134 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:37,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166365317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:34:37,135 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:34:37,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 101 [2022-03-15 22:34:37,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [673587039] [2022-03-15 22:34:37,135 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:34:37,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:34:37,163 INFO L252 McrAutomatonBuilder]: Finished intersection with 112 states and 174 transitions. [2022-03-15 22:34:37,163 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:34:40,295 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 20 new interpolants: [41869#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41857#(or (not (= 5 (select queue (+ 6 size front)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 41861#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41865#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41868#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41858#(or (not (= 5 (select queue (+ 6 size front)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 41863#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41864#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41866#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41867#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41853#(or (= (select queue (+ 19 front)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 41851#(or (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front)) 5))), 41860#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 41854#(or (= (select queue (+ 19 front)) 5) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 41852#(or (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ size front)) 5))), 41856#(or (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 41855#(or (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5))), 41870#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41862#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 41859#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (= (select queue (+ 19 front)) 5) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))))] [2022-03-15 22:34:40,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-15 22:34:40,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:34:40,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-15 22:34:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1913, Invalid=12911, Unknown=182, NotChecked=0, Total=15006 [2022-03-15 22:34:40,298 INFO L87 Difference]: Start difference. First operand 761 states and 1573 transitions. Second operand has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:34:43,753 INFO L93 Difference]: Finished difference Result 1558 states and 3066 transitions. [2022-03-15 22:34:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-15 22:34:43,753 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-03-15 22:34:43,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:34:43,756 INFO L225 Difference]: With dead ends: 1558 [2022-03-15 22:34:43,756 INFO L226 Difference]: Without dead ends: 974 [2022-03-15 22:34:43,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 161.3s TimeCoverageRelationStatistics Valid=4092, Invalid=22132, Unknown=182, NotChecked=0, Total=26406 [2022-03-15 22:34:43,758 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 839 mSDsluCounter, 3058 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 839 SdHoareTripleChecker+Valid, 1335 SdHoareTripleChecker+Invalid, 3192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:34:43,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [839 Valid, 1335 Invalid, 3192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-15 22:34:43,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-03-15 22:34:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 115. [2022-03-15 22:34:43,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.9736842105263157) internal successors, (225), 114 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:43,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 225 transitions. [2022-03-15 22:34:43,761 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 225 transitions. Word has length 48 [2022-03-15 22:34:43,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:34:43,762 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 225 transitions. [2022-03-15 22:34:43,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 2.064516129032258) internal successors, (128), 62 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 225 transitions. [2022-03-15 22:34:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-15 22:34:43,762 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:34:43,762 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:34:43,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-15 22:34:43,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:34:43,966 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:34:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:34:43,967 INFO L85 PathProgramCache]: Analyzing trace with hash 999512888, now seen corresponding path program 40 times [2022-03-15 22:34:43,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:34:43,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027629827] [2022-03-15 22:34:43,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:34:43,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:34:43,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:34:44,158 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:44,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:34:44,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027629827] [2022-03-15 22:34:44,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027629827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:34:44,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148020199] [2022-03-15 22:34:44,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:34:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:34:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:34:44,160 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:34:44,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-15 22:34:44,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:34:44,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:34:44,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-15 22:34:44,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:34:44,283 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:44,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:34:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 231 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:44,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148020199] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:34:44,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:34:44,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 22 [2022-03-15 22:34:44,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [445736107] [2022-03-15 22:34:44,351 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:34:44,362 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:34:44,385 INFO L252 McrAutomatonBuilder]: Finished intersection with 115 states and 179 transitions. [2022-03-15 22:34:44,385 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:34:44,517 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,522 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,528 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,534 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,539 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,545 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,561 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,567 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,573 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,578 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,584 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,590 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,596 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,601 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,607 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,613 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,618 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,624 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,633 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,639 INFO L387 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 8 treesize of output 4 [2022-03-15 22:34:44,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:34:44,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-15 22:34:44,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:34:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-15 22:34:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:34:44,641 INFO L87 Difference]: Start difference. First operand 115 states and 225 transitions. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:44,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:34:44,746 INFO L93 Difference]: Finished difference Result 978 states and 1903 transitions. [2022-03-15 22:34:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:34:44,746 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-03-15 22:34:44,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:34:44,748 INFO L225 Difference]: With dead ends: 978 [2022-03-15 22:34:44,748 INFO L226 Difference]: Without dead ends: 935 [2022-03-15 22:34:44,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:34:44,749 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 150 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:34:44,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 110 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:34:44,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 935 states. [2022-03-15 22:34:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 935 to 830. [2022-03-15 22:34:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.0675512665862485) internal successors, (1714), 829 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1714 transitions. [2022-03-15 22:34:44,757 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1714 transitions. Word has length 49 [2022-03-15 22:34:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:34:44,757 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 1714 transitions. [2022-03-15 22:34:44,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:34:44,757 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1714 transitions. [2022-03-15 22:34:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-15 22:34:44,758 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:34:44,758 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:34:44,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-15 22:34:44,963 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,SelfDestructingSolverStorable41 [2022-03-15 22:34:44,963 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:34:44,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:34:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1736859369, now seen corresponding path program 41 times [2022-03-15 22:34:44,969 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:34:44,969 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626959614] [2022-03-15 22:34:44,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:34:44,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:34:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:34:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:34:45,692 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:34:45,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626959614] [2022-03-15 22:34:45,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626959614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:34:45,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102349813] [2022-03-15 22:34:45,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:34:45,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:34:45,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:34:45,693 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:34:45,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-15 22:34:45,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-15 22:34:45,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:34:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-15 22:34:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:37:02,086 INFO L353 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-03-15 22:37:02,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2022-03-15 22:37:02,090 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 15 proven. 252 refuted. 195 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:02,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:37:03,179 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:37:03,179 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:37:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:03,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102349813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:37:03,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:37:03,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 106 [2022-03-15 22:37:03,248 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [225149439] [2022-03-15 22:37:03,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:37:03,252 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:37:03,278 INFO L252 McrAutomatonBuilder]: Finished intersection with 117 states and 182 transitions. [2022-03-15 22:37:03,278 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:37:06,754 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 21 new interpolants: [47098#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 47107#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47104#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47096#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47095#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47101#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47109#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47105#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47100#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47103#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47094#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47099#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 47110#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 20)) 5)) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47106#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47102#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47093#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47091#(or (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47108#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ front 20))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 47097#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 47090#(or (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5))), 47092#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ front 20))) (not (= (select queue (+ size front)) 5)))] [2022-03-15 22:37:06,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-15 22:37:06,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:37:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-15 22:37:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2097, Invalid=14215, Unknown=200, NotChecked=0, Total=16512 [2022-03-15 22:37:06,755 INFO L87 Difference]: Start difference. First operand 830 states and 1714 transitions. Second operand has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:37:10,599 INFO L93 Difference]: Finished difference Result 1698 states and 3344 transitions. [2022-03-15 22:37:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-15 22:37:10,600 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-03-15 22:37:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:37:10,603 INFO L225 Difference]: With dead ends: 1698 [2022-03-15 22:37:10,603 INFO L226 Difference]: Without dead ends: 1064 [2022-03-15 22:37:10,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4525 ImplicationChecksByTransitivity, 142.9s TimeCoverageRelationStatistics Valid=4490, Invalid=24380, Unknown=200, NotChecked=0, Total=29070 [2022-03-15 22:37:10,604 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 892 mSDsluCounter, 3341 mSDsCounter, 0 mSdLazyCounter, 3102 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 3434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 3102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:37:10,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [892 Valid, 1463 Invalid, 3434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 3102 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-15 22:37:10,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-03-15 22:37:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 120. [2022-03-15 22:37:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.9747899159663866) internal successors, (235), 119 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:10,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 235 transitions. [2022-03-15 22:37:10,608 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 235 transitions. Word has length 50 [2022-03-15 22:37:10,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:37:10,608 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 235 transitions. [2022-03-15 22:37:10,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.0615384615384613) internal successors, (134), 65 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 235 transitions. [2022-03-15 22:37:10,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-15 22:37:10,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:37:10,609 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:37:10,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-15 22:37:10,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:10,825 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:37:10,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:37:10,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1991957462, now seen corresponding path program 42 times [2022-03-15 22:37:10,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:37:10,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847670293] [2022-03-15 22:37:10,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:37:10,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:37:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:37:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:11,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:37:11,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847670293] [2022-03-15 22:37:11,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847670293] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:37:11,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639403430] [2022-03-15 22:37:11,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:37:11,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:11,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:37:11,024 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:37:11,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-15 22:37:11,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-03-15 22:37:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:37:11,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2022-03-15 22:37:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:37:11,138 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:11,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:37:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 253 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:11,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639403430] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:37:11,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:37:11,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 23 [2022-03-15 22:37:11,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2043899917] [2022-03-15 22:37:11,224 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:37:11,228 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:37:11,255 INFO L252 McrAutomatonBuilder]: Finished intersection with 120 states and 187 transitions. [2022-03-15 22:37:11,255 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:37:11,398 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,404 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,410 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,427 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,434 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,442 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,448 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,453 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,459 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,465 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,470 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,476 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,482 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,487 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,493 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,499 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,504 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,510 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,515 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,521 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,527 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:11,529 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:37:11,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-15 22:37:11,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:37:11,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-15 22:37:11,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:37:11,529 INFO L87 Difference]: Start difference. First operand 120 states and 235 transitions. Second operand has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:37:11,641 INFO L93 Difference]: Finished difference Result 1057 states and 2059 transitions. [2022-03-15 22:37:11,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-15 22:37:11,642 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-03-15 22:37:11,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:37:11,644 INFO L225 Difference]: With dead ends: 1057 [2022-03-15 22:37:11,644 INFO L226 Difference]: Without dead ends: 1012 [2022-03-15 22:37:11,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:37:11,644 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:37:11,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 124 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:37:11,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-15 22:37:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 902. [2022-03-15 22:37:11,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0654827968923417) internal successors, (1861), 901 states have internal predecessors, (1861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1861 transitions. [2022-03-15 22:37:11,653 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1861 transitions. Word has length 51 [2022-03-15 22:37:11,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:37:11,653 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1861 transitions. [2022-03-15 22:37:11,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.833333333333333) internal successors, (116), 23 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1861 transitions. [2022-03-15 22:37:11,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-15 22:37:11,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:37:11,654 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:37:11,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-15 22:37:11,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:11,860 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:37:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:37:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 858203637, now seen corresponding path program 43 times [2022-03-15 22:37:11,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:37:11,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880634555] [2022-03-15 22:37:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:37:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:37:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:37:12,642 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:12,642 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:37:12,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880634555] [2022-03-15 22:37:12,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880634555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:37:12,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866608494] [2022-03-15 22:37:12,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:37:12,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:12,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:37:12,644 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:37:12,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-15 22:37:12,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:37:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-15 22:37:12,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:37:12,812 INFO L387 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 [2022-03-15 22:37:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:12,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:37:12,860 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-15 22:37:12,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 11 [2022-03-15 22:37:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:12,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866608494] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:37:12,934 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:37:12,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2022-03-15 22:37:12,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [466670260] [2022-03-15 22:37:12,934 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:37:12,938 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:37:12,976 INFO L252 McrAutomatonBuilder]: Finished intersection with 122 states and 190 transitions. [2022-03-15 22:37:12,976 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:37:15,986 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 22 new interpolants: [52680#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 52681#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52685#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52673#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52675#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52676#(or (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52689#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52690#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52691#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 20)) 5)) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52679#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 52683#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52671#(or (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52686#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52678#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front))))), 52684#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52672#(or (not (= 5 (select queue (+ size front 1)))) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52677#(or (not (= 5 (select queue (+ 6 size front)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52674#(or (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5))), 52682#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (= 5 (select queue (+ 21 front))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52687#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52688#(or (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= (select queue (+ 3 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10))))), 52692#(or (not (= 5 (select queue (+ 19 size front)))) (not (= 5 (select queue (+ 6 size front)))) (not (= 5 (select queue (+ size front 8)))) (not (= (select queue (+ size front 20)) 5)) (not (= 5 (select queue (+ size front 13)))) (not (= 5 (select queue (+ size front 12)))) (not (= (select queue (+ size front 4)) 5)) (not (= (select queue (+ 5 size front)) 5)) (not (= 5 (select queue (+ size front 11)))) (not (= (select queue (+ 2 size front)) 5)) (not (= 5 (select queue (+ 9 size front)))) (not (= 5 (select queue (+ 16 size front)))) (not (= 5 (select queue (+ size front 1)))) (not (= 5 (select queue (+ size front 18)))) (not (= (select queue (+ 3 size front)) 5)) (not (= (select queue (+ 21 size front)) 5)) (not (= 5 (select queue (+ 14 size front)))) (not (= 5 (select queue (+ size front 17)))) (= 5 (select queue (+ 21 front))) (not (= 5 (select queue (+ size front 15)))) (not (= (select queue (+ size front)) 5)) (not (= 5 (select queue (+ 7 size front)))) (not (= 5 (select queue (+ size front 10)))))] [2022-03-15 22:37:15,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-15 22:37:15,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:37:15,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-15 22:37:15,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=4051, Unknown=0, NotChecked=0, Total=4692 [2022-03-15 22:37:15,987 INFO L87 Difference]: Start difference. First operand 902 states and 1861 transitions. Second operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:19,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:37:19,600 INFO L93 Difference]: Finished difference Result 1844 states and 3634 transitions. [2022-03-15 22:37:19,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-15 22:37:19,600 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-03-15 22:37:19,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:37:19,603 INFO L225 Difference]: With dead ends: 1844 [2022-03-15 22:37:19,603 INFO L226 Difference]: Without dead ends: 1158 [2022-03-15 22:37:19,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2016, Invalid=10640, Unknown=0, NotChecked=0, Total=12656 [2022-03-15 22:37:19,604 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 868 mSDsluCounter, 4045 mSDsCounter, 0 mSdLazyCounter, 3657 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 1775 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 3657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:37:19,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 1775 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 3657 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-15 22:37:19,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2022-03-15 22:37:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 125. [2022-03-15 22:37:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.9758064516129032) internal successors, (245), 124 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 245 transitions. [2022-03-15 22:37:19,608 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 245 transitions. Word has length 52 [2022-03-15 22:37:19,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:37:19,608 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 245 transitions. [2022-03-15 22:37:19,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:19,608 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 245 transitions. [2022-03-15 22:37:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-15 22:37:19,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:37:19,609 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:37:19,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-15 22:37:19,825 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,SelfDestructingSolverStorable44 [2022-03-15 22:37:19,826 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:37:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:37:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash 834532024, now seen corresponding path program 44 times [2022-03-15 22:37:19,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:37:19,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378452992] [2022-03-15 22:37:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:37:19,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:37:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:37:20,041 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:20,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:37:20,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378452992] [2022-03-15 22:37:20,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378452992] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:37:20,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485756748] [2022-03-15 22:37:20,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:37:20,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:20,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:37:20,043 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:37:20,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-15 22:37:20,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:37:20,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:37:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:37:20,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:37:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:20,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:37:20,262 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 276 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:20,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485756748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:37:20,262 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:37:20,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 24 [2022-03-15 22:37:20,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1657959170] [2022-03-15 22:37:20,262 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:37:20,266 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:37:20,309 INFO L252 McrAutomatonBuilder]: Finished intersection with 125 states and 195 transitions. [2022-03-15 22:37:20,309 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:37:20,451 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,457 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,464 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,469 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,474 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,483 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,489 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,495 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,500 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,507 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,513 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,519 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,525 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,530 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,536 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,542 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,547 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,553 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,559 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,564 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,570 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,576 INFO L387 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 8 treesize of output 4 [2022-03-15 22:37:20,578 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:37:20,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-15 22:37:20,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:37:20,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-15 22:37:20,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:37:20,578 INFO L87 Difference]: Start difference. First operand 125 states and 245 transitions. Second operand has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:20,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:37:20,688 INFO L93 Difference]: Finished difference Result 1139 states and 2221 transitions. [2022-03-15 22:37:20,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-15 22:37:20,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-03-15 22:37:20,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:37:20,691 INFO L225 Difference]: With dead ends: 1139 [2022-03-15 22:37:20,691 INFO L226 Difference]: Without dead ends: 1092 [2022-03-15 22:37:20,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:37:20,691 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 225 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:37:20,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 101 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:37:20,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-03-15 22:37:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 977. [2022-03-15 22:37:20,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.0635245901639343) internal successors, (2014), 976 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:20,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2014 transitions. [2022-03-15 22:37:20,700 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2014 transitions. Word has length 53 [2022-03-15 22:37:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:37:20,701 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 2014 transitions. [2022-03-15 22:37:20,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.84) internal successors, (121), 24 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:37:20,701 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2014 transitions. [2022-03-15 22:37:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-15 22:37:20,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:37:20,702 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:37:20,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-15 22:37:20,916 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,SelfDestructingSolverStorable45 [2022-03-15 22:37:20,916 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:37:20,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:37:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash -2076167913, now seen corresponding path program 45 times [2022-03-15 22:37:20,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:37:20,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236559112] [2022-03-15 22:37:20,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:37:20,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:37:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:37:21,760 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:37:21,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:37:21,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236559112] [2022-03-15 22:37:21,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236559112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:37:21,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560094317] [2022-03-15 22:37:21,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:37:21,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:37:21,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:37:21,761 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:37:21,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-15 22:37:21,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-03-15 22:37:21,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:37:21,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-15 22:37:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-03-15 22:39:40,503 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:39:40,504 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:39:40,741 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:39:40,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 22:39:40,941 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,SelfDestructingSolverStorable46 [2022-03-15 22:39:40,941 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 23,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 92 known predicates. [2022-03-15 22:39:40,942 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:39:40,943 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:39:40,944 INFO L732 BasicCegarLoop]: Path program histogram: [45, 1, 1] [2022-03-15 22:39:40,945 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:39:40,945 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:39:40,946 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:39:40 BasicIcfg [2022-03-15 22:39:40,946 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:39:40,946 INFO L158 Benchmark]: Toolchain (without parser) took 868951.70ms. Allocated memory was 185.6MB in the beginning and 283.1MB in the end (delta: 97.5MB). Free memory was 144.2MB in the beginning and 107.5MB in the end (delta: 36.6MB). Peak memory consumption was 136.6MB. Max. memory is 8.0GB. [2022-03-15 22:39:40,946 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.09ms. Allocated memory is still 185.6MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:39:40,946 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.88ms. Allocated memory is still 185.6MB. Free memory was 144.1MB in the beginning and 142.6MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 22:39:40,946 INFO L158 Benchmark]: Boogie Preprocessor took 9.98ms. Allocated memory is still 185.6MB. Free memory was 142.6MB in the beginning and 141.6MB in the end (delta: 919.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:39:40,946 INFO L158 Benchmark]: RCFGBuilder took 196.60ms. Allocated memory is still 185.6MB. Free memory was 141.5MB in the beginning and 132.6MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. [2022-03-15 22:39:40,947 INFO L158 Benchmark]: TraceAbstraction took 868720.79ms. Allocated memory was 185.6MB in the beginning and 283.1MB in the end (delta: 97.5MB). Free memory was 132.1MB in the beginning and 107.5MB in the end (delta: 24.6MB). Peak memory consumption was 122.9MB. Max. memory is 8.0GB. [2022-03-15 22:39:40,947 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 0.09ms. Allocated memory is still 185.6MB. Free memory is still 145.2MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.88ms. Allocated memory is still 185.6MB. Free memory was 144.1MB in the beginning and 142.6MB in the end (delta: 1.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.98ms. Allocated memory is still 185.6MB. Free memory was 142.6MB in the beginning and 141.6MB in the end (delta: 919.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 196.60ms. Allocated memory is still 185.6MB. Free memory was 141.5MB in the beginning and 132.6MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 8.0GB. * TraceAbstraction took 868720.79ms. Allocated memory was 185.6MB in the beginning and 283.1MB in the end (delta: 97.5MB). Free memory was 132.1MB in the beginning and 107.5MB in the end (delta: 24.6MB). Peak memory consumption was 122.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 20 PlacesBefore, 18 PlacesAfterwards, 15 TransitionsBefore, 13 TransitionsAfterwards, 16 CoEnabledTransitionPairs, 2 FixpointIterations, 3 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 3 TotalNumberOfCompositions, 18 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 18, positive: 18, positive conditional: 0, positive unconditional: 18, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 18, positive: 13, positive conditional: 0, positive unconditional: 13, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 5, unknown conditional: 0, unknown unconditional: 5] , Statistics on independence cache: Total cache size (in pairs): 5, Positive cache size: 5, Positive conditional cache size: 0, Positive unconditional cache size: 5, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 23,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 92 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 23,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 92 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 55 with TraceHistMax 23,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 92 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 868.7s, OverallIterations: 47, TraceHistogramMax: 23, PathProgramHistogramMax: 45, EmptinessCheckTime: 0.0s, AutomataDifference: 33.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 10394 SdHoareTripleChecker+Valid, 13.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10394 mSDsluCounter, 15931 SdHoareTripleChecker+Invalid, 10.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 35496 mSDsCounter, 3411 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 33163 IncrementalHoareTripleChecker+Invalid, 36574 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3411 mSolverCounterUnsat, 1169 mSDtfsCounter, 33163 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5973 GetRequests, 3972 SyntacticMatches, 68 SemanticMatches, 1933 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22779 ImplicationChecksByTransitivity, 677.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=977occurred in iteration=46, InterpolantAutomatonStates: 897, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 46 MinimizatonAttempts, 9698 StatesRemovedByMinimization, 43 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 650.2s InterpolantComputationTime, 2789 NumberOfCodeBlocks, 2789 NumberOfCodeBlocksAsserted, 229 NumberOfCheckSat, 4041 ConstructedInterpolants, 153 QuantifiedInterpolants, 19902 SizeOfPredicates, 67 NumberOfNonLiveVariables, 6644 ConjunctsInSsa, 1640 ConjunctsInUnsatCore, 134 InterpolantComputations, 2 PerfectInterpolantSequences, 6978/25114 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