/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/popl20-more/dec-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 21:58:59,448 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 21:58:59,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 21:58:59,507 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 21:58:59,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 21:58:59,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 21:58:59,543 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 21:58:59,546 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 21:58:59,574 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 21:58:59,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 21:58:59,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 21:58:59,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 21:58:59,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 21:58:59,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 21:58:59,576 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 21:58:59,577 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:58:59,577 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 21:58:59,577 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 21:58:59,578 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 21:58:59,578 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 21:58:59,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 21:58:59,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 21:58:59,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 21:58:59,763 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 21:58:59,765 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 21:58:59,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl [2022-03-15 21:58:59,766 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/dec-subseq.wvr.bpl' [2022-03-15 21:58:59,796 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 21:58:59,797 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 21:58:59,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 21:58:59,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 21:58:59,798 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 21:58:59,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,812 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,816 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 21:58:59,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 21:58:59,819 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 21:58:59,819 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 21:58:59,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 21:58:59,823 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,824 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,824 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 21:58:59,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 21:58:59,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 21:58:59,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 21:58:59,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/1) ... [2022-03-15 21:58:59,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 21:58:59,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:58:59,854 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 21:58:59,860 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 21:58:59,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 21:58:59,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 21:58:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 21:58:59,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 21:58:59,897 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 21:58:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 21:58:59,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 21:58:59,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 21:58:59,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 21:58:59,898 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 21:58:59,930 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 21:58:59,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 21:59:00,020 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 21:59:00,030 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 21:59:00,033 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 21:59:00,034 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:59:00 BoogieIcfgContainer [2022-03-15 21:59:00,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 21:59:00,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 21:59:00,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 21:59:00,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 21:59:00,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 09:58:59" (1/2) ... [2022-03-15 21:59:00,039 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b94cb7 and model type dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 09:59:00, skipping insertion in model container [2022-03-15 21:59:00,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 09:59:00" (2/2) ... [2022-03-15 21:59:00,040 INFO L111 eAbstractionObserver]: Analyzing ICFG dec-subseq.wvr.bpl [2022-03-15 21:59:00,043 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 21:59:00,043 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 21:59:00,043 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 21:59:00,043 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 21:59:00,063 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 21:59:00,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 21:59:00,109 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 21:59:00,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 21:59:00,118 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 21:59:00,128 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 21:59:00,130 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 21:59:00,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 21:59:00,156 INFO L129 PetriNetUnfolder]: 3/26 cut-off events. [2022-03-15 21:59:00,156 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 21:59:00,160 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 3/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 37 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 17. Up to 2 conditions per place. [2022-03-15 21:59:00,161 INFO L116 LiptonReduction]: Number of co-enabled transitions 124 [2022-03-15 21:59:00,522 INFO L131 LiptonReduction]: Checked pairs total: 144 [2022-03-15 21:59:00,522 INFO L133 LiptonReduction]: Total number of compositions: 15 [2022-03-15 21:59:00,528 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 48 flow [2022-03-15 21:59:00,536 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 21:59:00,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:00,540 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:00,541 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:00,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:00,543 INFO L85 PathProgramCache]: Analyzing trace with hash -892536048, now seen corresponding path program 1 times [2022-03-15 21:59:00,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:00,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762390107] [2022-03-15 21:59:00,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:00,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:00,636 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 21:59:00,636 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:00,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762390107] [2022-03-15 21:59:00,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762390107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:59:00,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:59:00,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 21:59:00,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [211318101] [2022-03-15 21:59:00,639 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:00,643 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:00,653 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 21:59:00,653 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:00,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:59:00,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 21:59:00,734 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:00,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 21:59:00,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 21:59:00,753 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 21:59:00,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:00,777 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2022-03-15 21:59:00,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 21:59:00,778 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 21:59:00,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:00,787 INFO L225 Difference]: With dead ends: 32 [2022-03-15 21:59:00,787 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 21:59:00,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 21:59:00,791 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:00,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 2 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 21:59:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-03-15 21:59:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 22 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:00,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 47 transitions. [2022-03-15 21:59:00,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 47 transitions. Word has length 8 [2022-03-15 21:59:00,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:00,822 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 47 transitions. [2022-03-15 21:59:00,822 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 21:59:00,822 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 47 transitions. [2022-03-15 21:59:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 21:59:00,822 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:00,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:00,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 21:59:00,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:00,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:00,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1252850488, now seen corresponding path program 1 times [2022-03-15 21:59:00,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:00,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852181837] [2022-03-15 21:59:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:00,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:00,874 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 21:59:00,874 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:00,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852181837] [2022-03-15 21:59:00,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852181837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:59:00,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:59:00,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 21:59:00,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [968019551] [2022-03-15 21:59:00,875 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:00,876 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:00,878 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 21:59:00,878 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:00,942 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [159#(or (= end start) (< i N)), 158#(< i N)] [2022-03-15 21:59:00,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:59:00,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:00,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:59:00,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:59:00,944 INFO L87 Difference]: Start difference. First operand 23 states and 47 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:01,011 INFO L93 Difference]: Finished difference Result 32 states and 62 transitions. [2022-03-15 21:59:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:59:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-15 21:59:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:01,012 INFO L225 Difference]: With dead ends: 32 [2022-03-15 21:59:01,012 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 21:59:01,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:59:01,013 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:01,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 21:59:01,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-15 21:59:01,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states 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 21:59:01,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2022-03-15 21:59:01,016 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 10 [2022-03-15 21:59:01,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:01,017 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2022-03-15 21:59:01,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,017 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2022-03-15 21:59:01,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 21:59:01,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:01,017 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:01,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 21:59:01,017 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:01,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:01,018 INFO L85 PathProgramCache]: Analyzing trace with hash -745074643, now seen corresponding path program 1 times [2022-03-15 21:59:01,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:01,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930661203] [2022-03-15 21:59:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:01,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:01,122 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 21:59:01,122 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:01,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930661203] [2022-03-15 21:59:01,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930661203] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:01,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346108204] [2022-03-15 21:59:01,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:01,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:01,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:01,125 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 21:59:01,130 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 21:59:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:01,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 21:59:01,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:01,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:59:01,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 21:59:01,318 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 21:59:01,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:01,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 21:59:01,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:01,360 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 13 treesize of output 17 [2022-03-15 21:59:01,397 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 21:59:01,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346108204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:01,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:01,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-15 21:59:01,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1194337628] [2022-03-15 21:59:01,398 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:01,399 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:01,401 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2022-03-15 21:59:01,401 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:01,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [319#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:01,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:59:01,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:01,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:59:01,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:59:01,483 INFO L87 Difference]: Start difference. First operand 26 states and 54 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:01,551 INFO L93 Difference]: Finished difference Result 59 states and 117 transitions. [2022-03-15 21:59:01,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:59:01,551 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-15 21:59:01,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:01,552 INFO L225 Difference]: With dead ends: 59 [2022-03-15 21:59:01,552 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 21:59:01,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-03-15 21:59:01,553 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:01,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:01,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 21:59:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-03-15 21:59:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.1944444444444446) internal successors, (79), 36 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 79 transitions. [2022-03-15 21:59:01,557 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 79 transitions. Word has length 12 [2022-03-15 21:59:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:01,557 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 79 transitions. [2022-03-15 21:59:01,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 79 transitions. [2022-03-15 21:59:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:59:01,558 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:01,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:01,582 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 21:59:01,772 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 21:59:01,772 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:01,773 INFO L85 PathProgramCache]: Analyzing trace with hash 253259973, now seen corresponding path program 2 times [2022-03-15 21:59:01,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:01,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382487758] [2022-03-15 21:59:01,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:01,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:01,801 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:01,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382487758] [2022-03-15 21:59:01,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382487758] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:59:01,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 21:59:01,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 21:59:01,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [712557120] [2022-03-15 21:59:01,802 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:01,803 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:01,805 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:59:01,805 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:01,830 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:59:01,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 21:59:01,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:01,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 21:59:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:59:01,831 INFO L87 Difference]: Start difference. First operand 37 states and 79 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:01,865 INFO L93 Difference]: Finished difference Result 77 states and 154 transitions. [2022-03-15 21:59:01,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 21:59:01,865 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-15 21:59:01,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:01,866 INFO L225 Difference]: With dead ends: 77 [2022-03-15 21:59:01,866 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 21:59:01,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 21:59:01,867 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:01,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:01,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 21:59:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-03-15 21:59:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.2941176470588234) internal successors, (117), 51 states have internal predecessors, (117), 0 states have call successors, (0), 0 states 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 21:59:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 117 transitions. [2022-03-15 21:59:01,873 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 117 transitions. Word has length 14 [2022-03-15 21:59:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 117 transitions. [2022-03-15 21:59:01,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:01,879 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 117 transitions. [2022-03-15 21:59:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 21:59:01,880 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:01,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:01,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 21:59:01,880 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:01,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1911032220, now seen corresponding path program 3 times [2022-03-15 21:59:01,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:01,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485223881] [2022-03-15 21:59:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:59:01,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:01,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485223881] [2022-03-15 21:59:01,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485223881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:01,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585234571] [2022-03-15 21:59:01,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:01,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:01,965 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 21:59:01,966 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 21:59:02,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 21:59:02,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:02,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 21:59:02,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:02,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:59:02,060 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 21:59:02,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585234571] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 21:59:02,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 21:59:02,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-15 21:59:02,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [310390089] [2022-03-15 21:59:02,060 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:02,062 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:02,064 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 21:59:02,064 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:02,111 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [686#(or (<= end start) (<= (+ 2 start) end))] [2022-03-15 21:59:02,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:59:02,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:02,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:59:02,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:59:02,112 INFO L87 Difference]: Start difference. First operand 52 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 21:59:02,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:02,174 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 21:59:02,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:59:02,175 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 14 [2022-03-15 21:59:02,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:02,177 INFO L225 Difference]: With dead ends: 79 [2022-03-15 21:59:02,177 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 21:59:02,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 21:59:02,178 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 36 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:02,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 0 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:02,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 21:59:02,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-03-15 21:59:02,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.263157894736842) internal successors, (129), 57 states have internal predecessors, (129), 0 states have call successors, (0), 0 states 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 21:59:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 129 transitions. [2022-03-15 21:59:02,193 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 129 transitions. Word has length 14 [2022-03-15 21:59:02,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:02,194 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 129 transitions. [2022-03-15 21:59:02,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 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 21:59:02,194 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 129 transitions. [2022-03-15 21:59:02,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:59:02,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:02,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:02,235 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 21:59:02,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:02,411 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:02,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:02,412 INFO L85 PathProgramCache]: Analyzing trace with hash -289173252, now seen corresponding path program 4 times [2022-03-15 21:59:02,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:02,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778467147] [2022-03-15 21:59:02,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:02,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:02,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:02,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778467147] [2022-03-15 21:59:02,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778467147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:02,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679611332] [2022-03-15 21:59:02,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:59:02,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:02,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:02,540 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 21:59:02,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:59:02,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:02,575 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 21:59:02,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:59:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:02,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:02,715 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 26 treesize of output 26 [2022-03-15 21:59:02,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:02,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:02,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2022-03-15 21:59:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:02,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:02,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:02,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 29 [2022-03-15 21:59:03,022 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:59:03,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-03-15 21:59:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:03,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679611332] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:03,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:03,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 21:59:03,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2141442234] [2022-03-15 21:59:03,255 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:03,256 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:03,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:59:03,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:03,344 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [989#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:03,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:59:03,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:59:03,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:59:03,345 INFO L87 Difference]: Start difference. First operand 58 states and 129 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 21:59:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:03,431 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2022-03-15 21:59:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 21:59:03,431 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 16 [2022-03-15 21:59:03,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:03,432 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:59:03,432 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 21:59:03,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:59:03,433 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 32 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:03,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 1 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:03,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 21:59:03,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-03-15 21:59:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.2) internal successors, (132), 60 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 21:59:03,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 132 transitions. [2022-03-15 21:59:03,436 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 132 transitions. Word has length 16 [2022-03-15 21:59:03,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:03,436 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 132 transitions. [2022-03-15 21:59:03,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 21:59:03,437 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 132 transitions. [2022-03-15 21:59:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:59:03,437 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:03,437 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:03,455 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 21:59:03,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:03,651 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:03,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:03,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1827578112, now seen corresponding path program 5 times [2022-03-15 21:59:03,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:03,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950277471] [2022-03-15 21:59:03,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:03,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:03,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:03,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950277471] [2022-03-15 21:59:03,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950277471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:03,780 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069068940] [2022-03-15 21:59:03,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:59:03,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:03,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:03,796 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 21:59:03,797 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 21:59:03,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 21:59:03,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:03,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:59:03,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:03,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:03,984 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 24 treesize of output 24 [2022-03-15 21:59:04,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:04,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 21:59:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:04,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:04,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:04,237 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 32 treesize of output 30 [2022-03-15 21:59:04,263 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:59:04,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 64 [2022-03-15 21:59:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:04,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069068940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:04,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:04,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 21:59:04,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1450463856] [2022-03-15 21:59:04,386 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:04,388 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:04,393 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 21:59:04,393 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:04,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1334#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 1333#(and ok (<= (select A i) v_old) (= end start))] [2022-03-15 21:59:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:59:04,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:04,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:59:04,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:59:04,559 INFO L87 Difference]: Start difference. First operand 61 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:04,683 INFO L93 Difference]: Finished difference Result 112 states and 222 transitions. [2022-03-15 21:59:04,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:59:04,683 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:59:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:04,684 INFO L225 Difference]: With dead ends: 112 [2022-03-15 21:59:04,684 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 21:59:04,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2022-03-15 21:59:04,684 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:04,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:04,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 21:59:04,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-03-15 21:59:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.1777777777777776) internal successors, (98), 45 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 21:59:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 98 transitions. [2022-03-15 21:59:04,687 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 98 transitions. Word has length 16 [2022-03-15 21:59:04,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:04,687 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 98 transitions. [2022-03-15 21:59:04,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 98 transitions. [2022-03-15 21:59:04,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:59:04,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:04,688 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:04,708 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 21:59:04,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:04,899 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:04,900 INFO L85 PathProgramCache]: Analyzing trace with hash 754492732, now seen corresponding path program 6 times [2022-03-15 21:59:04,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:04,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285876999] [2022-03-15 21:59:04,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:04,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:04,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:05,031 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:05,032 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:05,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285876999] [2022-03-15 21:59:05,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285876999] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:05,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861375732] [2022-03-15 21:59:05,032 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:59:05,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:05,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:05,033 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 21:59:05,034 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 21:59:05,061 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:59:05,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:05,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 21:59:05,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:05,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:05,157 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 27 treesize of output 25 [2022-03-15 21:59:05,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:05,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-03-15 21:59:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:05,449 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:59:05,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 57 [2022-03-15 21:59:05,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:05,461 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 42 treesize of output 38 [2022-03-15 21:59:05,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:05,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861375732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:05,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:05,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 21:59:05,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1995492281] [2022-03-15 21:59:05,734 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:05,734 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:05,737 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 21:59:05,737 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:05,819 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1649#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:05,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 21:59:05,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 21:59:05,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-15 21:59:05,820 INFO L87 Difference]: Start difference. First operand 46 states and 98 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 21:59:05,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:05,919 INFO L93 Difference]: Finished difference Result 113 states and 240 transitions. [2022-03-15 21:59:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:59:05,919 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 16 [2022-03-15 21:59:05,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:05,919 INFO L225 Difference]: With dead ends: 113 [2022-03-15 21:59:05,920 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 21:59:05,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 21:59:05,920 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:05,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 21:59:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-03-15 21:59:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.2758620689655173) internal successors, (132), 58 states have internal predecessors, (132), 0 states have call successors, (0), 0 states 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 21:59:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 132 transitions. [2022-03-15 21:59:05,923 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 132 transitions. Word has length 16 [2022-03-15 21:59:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:05,923 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 132 transitions. [2022-03-15 21:59:05,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 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 21:59:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 132 transitions. [2022-03-15 21:59:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 21:59:05,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:05,924 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:05,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 21:59:06,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:06,140 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:06,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1753297468, now seen corresponding path program 7 times [2022-03-15 21:59:06,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:06,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813112338] [2022-03-15 21:59:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:06,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:06,248 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:06,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:06,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813112338] [2022-03-15 21:59:06,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813112338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:06,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537182938] [2022-03-15 21:59:06,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:59:06,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:06,264 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 21:59:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:06,302 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 21:59:06,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 21:59:06,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:06,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:06,389 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 29 treesize of output 27 [2022-03-15 21:59:06,453 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 21:59:06,454 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 22 treesize of output 10 [2022-03-15 21:59:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:06,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:06,588 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:06,588 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 31 treesize of output 29 [2022-03-15 21:59:06,624 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 21:59:06,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 63 [2022-03-15 21:59:06,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:06,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537182938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:06,797 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:06,797 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 21:59:06,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [648407821] [2022-03-15 21:59:06,797 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:06,798 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:06,800 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 21:59:06,800 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:06,925 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1987#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:06,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 21:59:06,925 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:06,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 21:59:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-15 21:59:06,925 INFO L87 Difference]: Start difference. First operand 59 states and 132 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:07,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:07,034 INFO L93 Difference]: Finished difference Result 127 states and 275 transitions. [2022-03-15 21:59:07,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:59:07,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-15 21:59:07,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:07,036 INFO L225 Difference]: With dead ends: 127 [2022-03-15 21:59:07,036 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 21:59:07,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-03-15 21:59:07,039 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:07,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 21:59:07,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2022-03-15 21:59:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.2857142857142856) internal successors, (144), 63 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 21:59:07,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 144 transitions. [2022-03-15 21:59:07,049 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 144 transitions. Word has length 16 [2022-03-15 21:59:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:07,049 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 144 transitions. [2022-03-15 21:59:07,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:07,050 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 144 transitions. [2022-03-15 21:59:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 21:59:07,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:07,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:07,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-15 21:59:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:07,273 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:07,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1771504108, now seen corresponding path program 8 times [2022-03-15 21:59:07,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:07,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083291562] [2022-03-15 21:59:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:07,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:07,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:07,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:07,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083291562] [2022-03-15 21:59:07,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083291562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:07,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405288385] [2022-03-15 21:59:07,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:59:07,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:07,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:07,301 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 21:59:07,302 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 21:59:07,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:59:07,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:07,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 21:59:07,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:07,355 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:07,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:07,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405288385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:07,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:07,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 21:59:07,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1632461327] [2022-03-15 21:59:07,381 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:07,382 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:07,385 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 21:59:07,385 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:07,404 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:59:07,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 21:59:07,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:07,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 21:59:07,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:59:07,405 INFO L87 Difference]: Start difference. First operand 64 states and 144 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:59:07,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:07,440 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2022-03-15 21:59:07,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 21:59:07,440 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 18 [2022-03-15 21:59:07,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:07,441 INFO L225 Difference]: With dead ends: 133 [2022-03-15 21:59:07,441 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 21:59:07,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 21:59:07,441 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:07,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:07,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 21:59:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-03-15 21:59:07,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2989690721649483) internal successors, (223), 97 states have internal predecessors, (223), 0 states have call successors, (0), 0 states 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 21:59:07,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 223 transitions. [2022-03-15 21:59:07,444 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 223 transitions. Word has length 18 [2022-03-15 21:59:07,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:07,445 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 223 transitions. [2022-03-15 21:59:07,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 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 21:59:07,445 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 223 transitions. [2022-03-15 21:59:07,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:07,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:07,445 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:07,463 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 21:59:07,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:07,661 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:07,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:07,662 INFO L85 PathProgramCache]: Analyzing trace with hash -381016437, now seen corresponding path program 9 times [2022-03-15 21:59:07,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:07,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655628089] [2022-03-15 21:59:07,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:07,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:07,815 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:07,816 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:07,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655628089] [2022-03-15 21:59:07,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655628089] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:07,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381420474] [2022-03-15 21:59:07,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:07,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:07,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:07,817 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 21:59:07,851 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 21:59:07,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 21:59:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:07,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:59:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:08,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:08,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-03-15 21:59:08,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:08,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:08,401 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:08,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 29 treesize of output 63 [2022-03-15 21:59:08,648 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:08,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:10,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:10,131 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-03-15 21:59:10,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 52 treesize of output 102 [2022-03-15 21:59:10,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:10,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 93 [2022-03-15 21:59:10,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:10,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381420474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:10,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:10,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-15 21:59:10,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2020574218] [2022-03-15 21:59:10,777 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:10,779 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:10,782 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:59:10,782 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:10,921 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2821#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:10,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:59:10,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:59:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:59:10,922 INFO L87 Difference]: Start difference. First operand 98 states and 223 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:11,055 INFO L93 Difference]: Finished difference Result 161 states and 352 transitions. [2022-03-15 21:59:11,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:59:11,056 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:11,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:11,056 INFO L225 Difference]: With dead ends: 161 [2022-03-15 21:59:11,057 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 21:59:11,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:59:11,057 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:11,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:11,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 21:59:11,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2022-03-15 21:59:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.292929292929293) internal successors, (227), 99 states have internal predecessors, (227), 0 states have call successors, (0), 0 states 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 21:59:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-03-15 21:59:11,060 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 20 [2022-03-15 21:59:11,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:11,060 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-03-15 21:59:11,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-03-15 21:59:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:11,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:11,061 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:11,081 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 21:59:11,261 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,SelfDestructingSolverStorable10 [2022-03-15 21:59:11,262 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1406160659, now seen corresponding path program 10 times [2022-03-15 21:59:11,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:11,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252060866] [2022-03-15 21:59:11,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:11,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:11,443 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:11,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:11,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252060866] [2022-03-15 21:59:11,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252060866] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:11,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802191421] [2022-03-15 21:59:11,444 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:59:11,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:11,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:11,451 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 21:59:11,451 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 21:59:11,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:59:11,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:11,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:59:11,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:11,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:11,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:59:11,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:11,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:11,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:59:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:11,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:12,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:12,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2022-03-15 21:59:12,336 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:59:12,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 93 treesize of output 133 [2022-03-15 21:59:13,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:13,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802191421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:13,424 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:13,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 21:59:13,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [111048897] [2022-03-15 21:59:13,424 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:13,438 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:13,442 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:59:13,443 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:13,571 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3323#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:13,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:59:13,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:13,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:59:13,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:59:13,573 INFO L87 Difference]: Start difference. First operand 100 states and 227 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:13,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:13,753 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2022-03-15 21:59:13,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:59:13,754 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:13,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:13,755 INFO L225 Difference]: With dead ends: 201 [2022-03-15 21:59:13,755 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 21:59:13,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:59:13,756 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:13,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:13,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 21:59:13,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 94. [2022-03-15 21:59:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.2903225806451615) internal successors, (213), 93 states have internal predecessors, (213), 0 states have call successors, (0), 0 states 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 21:59:13,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 213 transitions. [2022-03-15 21:59:13,760 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 213 transitions. Word has length 20 [2022-03-15 21:59:13,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:13,760 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 213 transitions. [2022-03-15 21:59:13,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:13,760 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 213 transitions. [2022-03-15 21:59:13,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:13,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:13,761 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:13,777 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 21:59:13,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:13,977 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash -467270005, now seen corresponding path program 11 times [2022-03-15 21:59:13,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:13,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083650459] [2022-03-15 21:59:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:13,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:13,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:14,111 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:14,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083650459] [2022-03-15 21:59:14,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083650459] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:14,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765503212] [2022-03-15 21:59:14,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:59:14,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:14,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:14,113 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 21:59:14,130 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 21:59:14,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:59:14,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:14,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 21:59:14,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:14,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:14,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 50 [2022-03-15 21:59:14,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:14,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:14,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:14,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:14,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-03-15 21:59:14,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:14,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:14,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,864 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:14,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:14,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 94 [2022-03-15 21:59:14,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:14,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 91 [2022-03-15 21:59:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:15,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765503212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:15,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:15,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 21:59:15,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [866379484] [2022-03-15 21:59:15,117 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:15,119 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:15,122 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:59:15,122 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:15,199 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3855#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:15,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:59:15,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:15,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:59:15,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:59:15,200 INFO L87 Difference]: Start difference. First operand 94 states and 213 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:15,329 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2022-03-15 21:59:15,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:59:15,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:15,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:15,330 INFO L225 Difference]: With dead ends: 165 [2022-03-15 21:59:15,330 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 21:59:15,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:59:15,330 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 54 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:15,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 1 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 21:59:15,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 101. [2022-03-15 21:59:15,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 2.29) internal successors, (229), 100 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 21:59:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 229 transitions. [2022-03-15 21:59:15,333 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 229 transitions. Word has length 20 [2022-03-15 21:59:15,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:15,333 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 229 transitions. [2022-03-15 21:59:15,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:15,333 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 229 transitions. [2022-03-15 21:59:15,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:15,334 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:15,334 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:15,351 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 21:59:15,534 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,SelfDestructingSolverStorable12 [2022-03-15 21:59:15,534 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:15,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:15,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1931394221, now seen corresponding path program 12 times [2022-03-15 21:59:15,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:15,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696350588] [2022-03-15 21:59:15,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:15,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:15,683 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:59:15,684 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:15,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696350588] [2022-03-15 21:59:15,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696350588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:15,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107359350] [2022-03-15 21:59:15,684 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:59:15,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:15,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:15,688 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 21:59:15,689 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 21:59:15,713 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 21:59:15,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:15,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 21:59:15,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:15,937 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:59:16,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:16,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:16,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:16,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:16,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:16,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 41 [2022-03-15 21:59:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:16,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:16,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:16,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:16,811 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:16,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:16,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:16,851 INFO L353 Elim1Store]: treesize reduction 14, result has 79.7 percent of original size [2022-03-15 21:59:16,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 84 [2022-03-15 21:59:16,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:16,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 75 [2022-03-15 21:59:17,755 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:17,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107359350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:17,755 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:17,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-03-15 21:59:17,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1697933392] [2022-03-15 21:59:17,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:17,757 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:17,760 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:59:17,760 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:17,893 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4368#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:17,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 21:59:17,894 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:17,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 21:59:17,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 21:59:17,894 INFO L87 Difference]: Start difference. First operand 101 states and 229 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 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 21:59:18,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:18,018 INFO L93 Difference]: Finished difference Result 262 states and 593 transitions. [2022-03-15 21:59:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:59:18,018 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 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 20 [2022-03-15 21:59:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:18,019 INFO L225 Difference]: With dead ends: 262 [2022-03-15 21:59:18,019 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 21:59:18,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2022-03-15 21:59:18,020 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:18,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 21:59:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2022-03-15 21:59:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.3) internal successors, (253), 110 states have internal predecessors, (253), 0 states have call successors, (0), 0 states 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 21:59:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 253 transitions. [2022-03-15 21:59:18,027 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 253 transitions. Word has length 20 [2022-03-15 21:59:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:18,027 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 253 transitions. [2022-03-15 21:59:18,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 10 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 21:59:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 253 transitions. [2022-03-15 21:59:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:18,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:18,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:18,048 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 21:59:18,242 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,SelfDestructingSolverStorable13 [2022-03-15 21:59:18,243 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:18,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:18,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1040041521, now seen corresponding path program 13 times [2022-03-15 21:59:18,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:18,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681083176] [2022-03-15 21:59:18,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:18,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:18,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:18,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:18,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681083176] [2022-03-15 21:59:18,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681083176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:18,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914907824] [2022-03-15 21:59:18,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:59:18,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:18,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:18,415 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 21:59:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:18,451 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 21:59:18,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:59:18,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:18,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:18,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:59:18,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:18,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:18,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:18,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:18,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:18,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:59:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:18,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:19,100 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:59:19,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:59:19,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:19,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:59:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:19,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914907824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:19,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:19,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 21:59:19,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1125949039] [2022-03-15 21:59:19,742 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:19,743 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:19,746 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 21:59:19,746 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:19,856 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4993#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 4994#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok)] [2022-03-15 21:59:19,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:59:19,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:19,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:59:19,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:59:19,857 INFO L87 Difference]: Start difference. First operand 111 states and 253 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:20,004 INFO L93 Difference]: Finished difference Result 237 states and 529 transitions. [2022-03-15 21:59:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 21:59:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:20,005 INFO L225 Difference]: With dead ends: 237 [2022-03-15 21:59:20,005 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 21:59:20,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-03-15 21:59:20,008 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 50 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:20,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 1 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:20,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 21:59:20,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2022-03-15 21:59:20,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.322314049586777) internal successors, (281), 121 states have internal predecessors, (281), 0 states have call successors, (0), 0 states 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 21:59:20,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 281 transitions. [2022-03-15 21:59:20,014 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 281 transitions. Word has length 20 [2022-03-15 21:59:20,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:20,014 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 281 transitions. [2022-03-15 21:59:20,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 281 transitions. [2022-03-15 21:59:20,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:20,016 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:20,017 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:20,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:20,231 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,SelfDestructingSolverStorable14 [2022-03-15 21:59:20,231 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:20,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1305244897, now seen corresponding path program 14 times [2022-03-15 21:59:20,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:20,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675312548] [2022-03-15 21:59:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:20,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:20,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675312548] [2022-03-15 21:59:20,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675312548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:20,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534194367] [2022-03-15 21:59:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:59:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:20,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:20,416 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 21:59:20,419 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 21:59:20,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:59:20,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:59:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:20,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:20,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 52 [2022-03-15 21:59:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:20,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:20,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:20,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:20,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:59:20,859 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:20,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:21,289 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:59:21,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:59:21,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:21,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:59:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:21,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534194367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:21,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:21,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 21:59:21,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1999552791] [2022-03-15 21:59:21,885 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:21,886 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:21,889 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 21:59:21,889 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:22,006 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5615#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 5616#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok)] [2022-03-15 21:59:22,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:59:22,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:22,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:59:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:59:22,007 INFO L87 Difference]: Start difference. First operand 122 states and 281 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:22,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:22,187 INFO L93 Difference]: Finished difference Result 284 states and 626 transitions. [2022-03-15 21:59:22,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 21:59:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:22,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:22,191 INFO L225 Difference]: With dead ends: 284 [2022-03-15 21:59:22,191 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 21:59:22,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:59:22,192 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:22,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:22,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 21:59:22,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-15 21:59:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.3309352517985613) internal successors, (324), 139 states have internal predecessors, (324), 0 states have call successors, (0), 0 states 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 21:59:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 324 transitions. [2022-03-15 21:59:22,199 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 324 transitions. Word has length 20 [2022-03-15 21:59:22,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:22,199 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 324 transitions. [2022-03-15 21:59:22,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:22,199 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 324 transitions. [2022-03-15 21:59:22,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:22,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:22,200 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:22,235 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 21:59:22,436 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,SelfDestructingSolverStorable15 [2022-03-15 21:59:22,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:22,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1482940661, now seen corresponding path program 15 times [2022-03-15 21:59:22,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:22,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629750324] [2022-03-15 21:59:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:22,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:22,613 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:22,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629750324] [2022-03-15 21:59:22,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629750324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:22,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902769669] [2022-03-15 21:59:22,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:22,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:22,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:22,615 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 21:59:22,616 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 21:59:22,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 21:59:22,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:22,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-15 21:59:22,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:22,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:22,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 55 [2022-03-15 21:59:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:22,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:22,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:22,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:22,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:23,000 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:23,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 48 treesize of output 72 [2022-03-15 21:59:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:23,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:23,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:23,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:23,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:23,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:23,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:23,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:23,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 56 [2022-03-15 21:59:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:24,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902769669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:24,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:24,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2022-03-15 21:59:24,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1464089604] [2022-03-15 21:59:24,307 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:24,308 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:24,311 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 21:59:24,311 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:24,406 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6326#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:24,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 21:59:24,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:24,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 21:59:24,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:59:24,407 INFO L87 Difference]: Start difference. First operand 140 states and 324 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:24,570 INFO L93 Difference]: Finished difference Result 306 states and 711 transitions. [2022-03-15 21:59:24,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:59:24,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:24,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:24,573 INFO L225 Difference]: With dead ends: 306 [2022-03-15 21:59:24,573 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 21:59:24,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=721, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:59:24,574 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 49 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:24,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 1 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:24,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 21:59:24,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 161. [2022-03-15 21:59:24,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.35) internal successors, (376), 160 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 376 transitions. [2022-03-15 21:59:24,578 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 376 transitions. Word has length 20 [2022-03-15 21:59:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 376 transitions. [2022-03-15 21:59:24,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 376 transitions. [2022-03-15 21:59:24,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:24,578 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:24,579 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:24,600 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 21:59:24,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:24,779 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:24,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 304236435, now seen corresponding path program 16 times [2022-03-15 21:59:24,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:24,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484221778] [2022-03-15 21:59:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:24,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:24,911 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:24,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484221778] [2022-03-15 21:59:24,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484221778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:24,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220584589] [2022-03-15 21:59:24,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:59:24,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:24,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:24,912 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 21:59:24,914 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 21:59:24,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:59:24,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:24,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 21:59:24,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:25,106 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:25,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2022-03-15 21:59:25,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:25,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:25,345 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:25,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 13 [2022-03-15 21:59:25,352 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:25,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:25,678 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:59:25,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 55 treesize of output 113 [2022-03-15 21:59:25,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:25,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 94 [2022-03-15 21:59:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:26,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220584589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:26,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:26,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 21:59:26,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [959326126] [2022-03-15 21:59:26,235 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:26,236 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:26,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 21:59:26,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:26,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7095#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:26,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:59:26,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:26,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:59:26,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-03-15 21:59:26,347 INFO L87 Difference]: Start difference. First operand 161 states and 376 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:26,470 INFO L93 Difference]: Finished difference Result 317 states and 734 transitions. [2022-03-15 21:59:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:59:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:26,471 INFO L225 Difference]: With dead ends: 317 [2022-03-15 21:59:26,471 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 21:59:26,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-15 21:59:26,472 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 58 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:26,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 1 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:26,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 21:59:26,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 159. [2022-03-15 21:59:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.367088607594937) internal successors, (374), 158 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 374 transitions. [2022-03-15 21:59:26,476 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 374 transitions. Word has length 20 [2022-03-15 21:59:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:26,476 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 374 transitions. [2022-03-15 21:59:26,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:26,476 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 374 transitions. [2022-03-15 21:59:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 21:59:26,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:26,477 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:26,494 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 21:59:26,677 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,SelfDestructingSolverStorable17 [2022-03-15 21:59:26,677 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:26,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1016589853, now seen corresponding path program 17 times [2022-03-15 21:59:26,678 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:26,678 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485118704] [2022-03-15 21:59:26,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:26,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:26,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:26,853 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:26,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485118704] [2022-03-15 21:59:26,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485118704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:26,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202366109] [2022-03-15 21:59:26,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:59:26,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:26,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:26,854 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 21:59:26,855 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 21:59:26,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 21:59:26,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 21:59:26,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:27,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:27,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 51 [2022-03-15 21:59:27,167 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 21:59:27,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 13 [2022-03-15 21:59:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:27,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:27,554 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 21:59:27,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 114 [2022-03-15 21:59:27,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:27,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 95 [2022-03-15 21:59:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:28,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202366109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:28,196 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:28,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 21:59:28,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [119052170] [2022-03-15 21:59:28,196 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:28,197 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:28,201 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 21:59:28,201 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:28,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7869#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:28,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:59:28,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:28,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:59:28,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 21:59:28,462 INFO L87 Difference]: Start difference. First operand 159 states and 374 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:28,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:28,612 INFO L93 Difference]: Finished difference Result 327 states and 758 transitions. [2022-03-15 21:59:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 21:59:28,612 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-15 21:59:28,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:28,613 INFO L225 Difference]: With dead ends: 327 [2022-03-15 21:59:28,613 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 21:59:28,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-15 21:59:28,614 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 62 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:28,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 1 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:28,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 21:59:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 164. [2022-03-15 21:59:28,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.3680981595092025) internal successors, (386), 163 states have internal predecessors, (386), 0 states have call successors, (0), 0 states 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 21:59:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 386 transitions. [2022-03-15 21:59:28,618 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 386 transitions. Word has length 20 [2022-03-15 21:59:28,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:28,618 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 386 transitions. [2022-03-15 21:59:28,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:28,618 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 386 transitions. [2022-03-15 21:59:28,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 21:59:28,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:28,618 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:28,658 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 21:59:28,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:28,819 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:28,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:28,819 INFO L85 PathProgramCache]: Analyzing trace with hash -166379485, now seen corresponding path program 18 times [2022-03-15 21:59:28,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:28,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553583731] [2022-03-15 21:59:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:28,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:28,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553583731] [2022-03-15 21:59:28,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553583731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:28,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582190225] [2022-03-15 21:59:28,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:59:28,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:28,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:28,853 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 21:59:28,854 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 21:59:28,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:59:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 21:59:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:28,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:28,950 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:28,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582190225] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:28,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:28,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 21:59:28,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [225062681] [2022-03-15 21:59:28,950 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:28,952 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:28,955 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 34 transitions. [2022-03-15 21:59:28,955 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:28,974 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 21:59:28,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 21:59:28,974 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:28,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 21:59:28,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:59:28,974 INFO L87 Difference]: Start difference. First operand 164 states and 386 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:29,023 INFO L93 Difference]: Finished difference Result 283 states and 632 transitions. [2022-03-15 21:59:29,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 21:59:29,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-03-15 21:59:29,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:29,024 INFO L225 Difference]: With dead ends: 283 [2022-03-15 21:59:29,024 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 21:59:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 21:59:29,025 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:29,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 21:59:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 21:59:29,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 214. [2022-03-15 21:59:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 states have internal predecessors, (511), 0 states have call successors, (0), 0 states 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 21:59:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2022-03-15 21:59:29,029 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 22 [2022-03-15 21:59:29,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:29,029 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2022-03-15 21:59:29,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:29,029 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2022-03-15 21:59:29,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:29,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:29,030 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:29,046 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 21:59:29,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:29,246 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:29,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:29,246 INFO L85 PathProgramCache]: Analyzing trace with hash -689732318, now seen corresponding path program 19 times [2022-03-15 21:59:29,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:29,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34973115] [2022-03-15 21:59:29,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:29,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:29,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-15 21:59:29,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:29,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34973115] [2022-03-15 21:59:29,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34973115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:29,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116370382] [2022-03-15 21:59:29,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 21:59:29,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:29,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:29,451 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 21:59:29,452 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 21:59:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:29,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:29,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:29,896 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:29,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:59:30,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:30,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:30,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:30,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:30,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:30,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:30,768 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:30,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:59:30,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:30,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:59:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:34,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116370382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:34,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:34,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 21:59:34,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1523736916] [2022-03-15 21:59:34,174 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:34,175 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:34,180 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:59:34,180 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:34,336 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9538#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:34,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 21:59:34,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 21:59:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 21:59:34,337 INFO L87 Difference]: Start difference. First operand 214 states and 511 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:34,479 INFO L93 Difference]: Finished difference Result 523 states and 1246 transitions. [2022-03-15 21:59:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 21:59:34,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:34,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:34,481 INFO L225 Difference]: With dead ends: 523 [2022-03-15 21:59:34,481 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 21:59:34,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:59:34,482 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:34,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 21:59:34,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 192. [2022-03-15 21:59:34,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.4083769633507854) internal successors, (460), 191 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 460 transitions. [2022-03-15 21:59:34,488 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 460 transitions. Word has length 24 [2022-03-15 21:59:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 460 transitions. [2022-03-15 21:59:34,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 460 transitions. [2022-03-15 21:59:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:34,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:34,489 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:34,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-03-15 21:59:34,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:34,699 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:34,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:34,700 INFO L85 PathProgramCache]: Analyzing trace with hash 201620382, now seen corresponding path program 20 times [2022-03-15 21:59:34,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:34,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972703294] [2022-03-15 21:59:34,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:34,852 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:34,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:34,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972703294] [2022-03-15 21:59:34,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972703294] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:34,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976455175] [2022-03-15 21:59:34,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 21:59:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:34,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:34,854 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 21:59:34,855 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 21:59:34,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 21:59:34,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:34,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:34,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:35,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:35,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:59:35,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:35,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:35,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:35,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:36,279 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:36,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 21:59:36,306 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:36,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 21:59:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:37,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976455175] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:37,834 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:37,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-15 21:59:37,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1661861082] [2022-03-15 21:59:37,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:37,836 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:37,840 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 21:59:37,841 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:37,956 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10619#(and (<= (+ start 1) end) (<= (select A i) (select queue start)) (<= end (+ start 1)) (<= (select queue start) v_old) ok), 10620#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:37,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:59:37,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:37,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:59:37,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:59:37,967 INFO L87 Difference]: Start difference. First operand 192 states and 460 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 21:59:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:38,170 INFO L93 Difference]: Finished difference Result 301 states and 675 transitions. [2022-03-15 21:59:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 21:59:38,170 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:38,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:38,171 INFO L225 Difference]: With dead ends: 301 [2022-03-15 21:59:38,171 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 21:59:38,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:59:38,172 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 56 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:38,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 1 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 21:59:38,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 21:59:38,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2022-03-15 21:59:38,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.386740331491713) internal successors, (432), 181 states have internal predecessors, (432), 0 states have call successors, (0), 0 states 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 21:59:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 432 transitions. [2022-03-15 21:59:38,176 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 432 transitions. Word has length 24 [2022-03-15 21:59:38,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:38,176 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 432 transitions. [2022-03-15 21:59:38,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 21:59:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 432 transitions. [2022-03-15 21:59:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:38,176 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:38,177 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:38,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-15 21:59:38,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:38,393 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:38,393 INFO L85 PathProgramCache]: Analyzing trace with hash -241278758, now seen corresponding path program 21 times [2022-03-15 21:59:38,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:38,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873663503] [2022-03-15 21:59:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:38,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:38,597 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:38,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:38,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873663503] [2022-03-15 21:59:38,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873663503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:38,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750304641] [2022-03-15 21:59:38,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 21:59:38,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:38,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:38,612 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 21:59:38,621 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 21:59:38,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 21:59:38,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:38,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:59:38,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:39,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:39,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:59:39,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:39,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:39,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:39,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:39,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:39,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 53 treesize of output 137 [2022-03-15 21:59:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:41,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:43,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:43,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:43,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:43,776 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 21:59:43,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 144 [2022-03-15 21:59:43,804 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:43,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 167 [2022-03-15 21:59:45,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:45,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750304641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:45,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:45,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-15 21:59:45,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1240291264] [2022-03-15 21:59:45,996 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:45,998 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:46,002 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 21:59:46,002 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:46,097 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11462#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 21:59:46,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 21:59:46,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 21:59:46,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 21:59:46,098 INFO L87 Difference]: Start difference. First operand 182 states and 432 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 21:59:46,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:46,286 INFO L93 Difference]: Finished difference Result 310 states and 723 transitions. [2022-03-15 21:59:46,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 21:59:46,286 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:46,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:46,287 INFO L225 Difference]: With dead ends: 310 [2022-03-15 21:59:46,287 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 21:59:46,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 21:59:46,288 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:46,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:46,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 21:59:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 192. [2022-03-15 21:59:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.3769633507853403) internal successors, (454), 191 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 21:59:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 454 transitions. [2022-03-15 21:59:46,292 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 454 transitions. Word has length 24 [2022-03-15 21:59:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:46,292 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 454 transitions. [2022-03-15 21:59:46,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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 21:59:46,292 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 454 transitions. [2022-03-15 21:59:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:46,293 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:46,293 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:46,319 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 21:59:46,508 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,SelfDestructingSolverStorable22 [2022-03-15 21:59:46,509 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:46,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1545898338, now seen corresponding path program 22 times [2022-03-15 21:59:46,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:46,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229571911] [2022-03-15 21:59:46,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:46,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:46,702 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:46,703 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:46,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229571911] [2022-03-15 21:59:46,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229571911] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:46,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239732284] [2022-03-15 21:59:46,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 21:59:46,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:46,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:46,704 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 21:59:46,706 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 21:59:46,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 21:59:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:46,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 21:59:46,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:47,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:47,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 21:59:47,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:47,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:47,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:47,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 21:59:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:47,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:48,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:48,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 91 [2022-03-15 21:59:48,162 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:48,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 231 [2022-03-15 21:59:51,028 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:51,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239732284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:51,028 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:51,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 21:59:51,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1400589202] [2022-03-15 21:59:51,028 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:51,030 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:51,035 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 21:59:51,035 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:51,169 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12330#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:51,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:59:51,169 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:51,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:59:51,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-03-15 21:59:51,170 INFO L87 Difference]: Start difference. First operand 192 states and 454 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 21:59:51,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:51,359 INFO L93 Difference]: Finished difference Result 368 states and 855 transitions. [2022-03-15 21:59:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:59:51,359 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 24 [2022-03-15 21:59:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:51,360 INFO L225 Difference]: With dead ends: 368 [2022-03-15 21:59:51,361 INFO L226 Difference]: Without dead ends: 349 [2022-03-15 21:59:51,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 21:59:51,361 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:51,361 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:51,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-15 21:59:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 166. [2022-03-15 21:59:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.3878787878787877) internal successors, (394), 165 states have internal predecessors, (394), 0 states have call successors, (0), 0 states 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 21:59:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 394 transitions. [2022-03-15 21:59:51,365 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 394 transitions. Word has length 24 [2022-03-15 21:59:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:51,365 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 394 transitions. [2022-03-15 21:59:51,365 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 21:59:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 394 transitions. [2022-03-15 21:59:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:51,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:51,365 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:51,381 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 21:59:51,575 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,SelfDestructingSolverStorable23 [2022-03-15 21:59:51,575 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 225072050, now seen corresponding path program 23 times [2022-03-15 21:59:51,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:51,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015063891] [2022-03-15 21:59:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:51,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:51,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:51,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:51,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015063891] [2022-03-15 21:59:51,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015063891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:51,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245271927] [2022-03-15 21:59:51,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 21:59:51,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:51,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:51,779 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 21:59:51,780 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 21:59:51,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 21:59:51,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:51,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 21:59:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:52,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:52,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:59:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:52,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:52,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 21:59:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:52,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 21:59:53,248 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 21:59:53,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 191 [2022-03-15 21:59:53,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:53,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 180 [2022-03-15 21:59:56,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 21:59:56,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245271927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 21:59:56,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 21:59:56,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 21:59:56,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [104515549] [2022-03-15 21:59:56,295 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 21:59:56,297 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 21:59:56,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 21:59:56,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 21:59:56,478 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13203#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 21:59:56,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 21:59:56,481 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 21:59:56,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 21:59:56,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 21:59:56,482 INFO L87 Difference]: Start difference. First operand 166 states and 394 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:56,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 21:59:56,635 INFO L93 Difference]: Finished difference Result 331 states and 764 transitions. [2022-03-15 21:59:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 21:59:56,640 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 21:59:56,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 21:59:56,648 INFO L225 Difference]: With dead ends: 331 [2022-03-15 21:59:56,648 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 21:59:56,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 21:59:56,649 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 21:59:56,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 21:59:56,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 21:59:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 156. [2022-03-15 21:59:56,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.3870967741935485) internal successors, (370), 155 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 370 transitions. [2022-03-15 21:59:56,668 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 370 transitions. Word has length 24 [2022-03-15 21:59:56,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 21:59:56,668 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 370 transitions. [2022-03-15 21:59:56,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 14 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 21:59:56,668 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 370 transitions. [2022-03-15 21:59:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 21:59:56,669 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 21:59:56,669 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 21:59:56,684 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 21:59:56,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:56,869 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 21:59:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 21:59:56,870 INFO L85 PathProgramCache]: Analyzing trace with hash 164233434, now seen corresponding path program 24 times [2022-03-15 21:59:56,870 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 21:59:56,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657446286] [2022-03-15 21:59:56,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 21:59:56,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 21:59:56,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 21:59:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 21:59:57,101 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 21:59:57,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657446286] [2022-03-15 21:59:57,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657446286] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 21:59:57,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707610302] [2022-03-15 21:59:57,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 21:59:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 21:59:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 21:59:57,102 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 21:59:57,104 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 21:59:57,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 21:59:57,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 21:59:57,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 21:59:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 21:59:58,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:58,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 84 [2022-03-15 21:59:59,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:59,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:59,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 21:59:59,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 21:59:59,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 21:59:59,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 40 treesize of output 88 [2022-03-15 22:00:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:00,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:02,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:02,565 INFO L353 Elim1Store]: treesize reduction 76, result has 65.0 percent of original size [2022-03-15 22:00:02,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 73 treesize of output 179 [2022-03-15 22:00:02,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:02,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 178 [2022-03-15 22:00:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:06,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707610302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:06,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:06,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 22:00:06,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1379607086] [2022-03-15 22:00:06,584 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:06,586 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:06,590 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:00:06,590 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:06,676 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14022#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:00:06,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:00:06,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:06,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:00:06,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:00:06,677 INFO L87 Difference]: Start difference. First operand 156 states and 370 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:06,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:06,891 INFO L93 Difference]: Finished difference Result 284 states and 638 transitions. [2022-03-15 22:00:06,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:00:06,891 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:06,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:06,892 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:00:06,892 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 22:00:06,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:00:06,893 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:06,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:06,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 22:00:06,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-03-15 22:00:06,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.388235294117647) internal successors, (406), 170 states have internal predecessors, (406), 0 states have call successors, (0), 0 states 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 22:00:06,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 406 transitions. [2022-03-15 22:00:06,896 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 406 transitions. Word has length 24 [2022-03-15 22:00:06,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:06,896 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 406 transitions. [2022-03-15 22:00:06,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:06,896 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 406 transitions. [2022-03-15 22:00:06,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:06,896 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:06,896 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:06,938 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 22:00:07,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:07,097 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:07,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:07,097 INFO L85 PathProgramCache]: Analyzing trace with hash -385086414, now seen corresponding path program 25 times [2022-03-15 22:00:07,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:07,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552361880] [2022-03-15 22:00:07,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:07,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:07,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:00:07,328 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:07,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552361880] [2022-03-15 22:00:07,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552361880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:07,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314175460] [2022-03-15 22:00:07,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:00:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:07,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:07,336 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 22:00:07,368 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 22:00:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:07,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:00:07,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:07,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:07,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 22:00:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:08,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:08,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 22:00:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:08,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:08,802 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:00:08,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 22:00:08,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:08,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 22:00:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:11,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314175460] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:11,873 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:11,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 22:00:11,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [380113828] [2022-03-15 22:00:11,874 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:11,876 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:11,886 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:00:11,886 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:12,077 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14821#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:00:12,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:00:12,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:12,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:00:12,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:00:12,078 INFO L87 Difference]: Start difference. First operand 171 states and 406 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:12,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:12,264 INFO L93 Difference]: Finished difference Result 494 states and 1157 transitions. [2022-03-15 22:00:12,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:00:12,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:12,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:12,265 INFO L225 Difference]: With dead ends: 494 [2022-03-15 22:00:12,265 INFO L226 Difference]: Without dead ends: 452 [2022-03-15 22:00:12,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:00:12,266 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:12,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:00:12,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-15 22:00:12,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 189. [2022-03-15 22:00:12,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.393617021276596) internal successors, (450), 188 states have internal predecessors, (450), 0 states have call successors, (0), 0 states 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 22:00:12,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 450 transitions. [2022-03-15 22:00:12,270 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 450 transitions. Word has length 24 [2022-03-15 22:00:12,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:12,270 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 450 transitions. [2022-03-15 22:00:12,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 450 transitions. [2022-03-15 22:00:12,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:12,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:12,271 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:12,287 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 22:00:12,471 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,SelfDestructingSolverStorable26 [2022-03-15 22:00:12,472 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:12,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:12,472 INFO L85 PathProgramCache]: Analyzing trace with hash 530286430, now seen corresponding path program 26 times [2022-03-15 22:00:12,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:12,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203382139] [2022-03-15 22:00:12,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:12,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:00:12,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:12,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203382139] [2022-03-15 22:00:12,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203382139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:12,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082414116] [2022-03-15 22:00:12,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:00:12,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:12,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:12,697 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 22:00:12,699 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 22:00:12,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:00:12,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:12,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:00:12,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:13,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:13,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 86 [2022-03-15 22:00:13,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:13,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:13,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:13,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 22:00:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:13,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:14,230 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:00:14,230 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 22:00:14,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:14,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 22:00:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:15,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082414116] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:15,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:15,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-15 22:00:15,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [397464158] [2022-03-15 22:00:15,902 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:15,904 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:15,908 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:00:15,908 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:16,061 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15870#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end)), 15869#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:00:16,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:00:16,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:00:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:00:16,062 INFO L87 Difference]: Start difference. First operand 189 states and 450 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 22:00:16,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:16,306 INFO L93 Difference]: Finished difference Result 381 states and 881 transitions. [2022-03-15 22:00:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:00:16,307 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:16,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:16,308 INFO L225 Difference]: With dead ends: 381 [2022-03-15 22:00:16,308 INFO L226 Difference]: Without dead ends: 348 [2022-03-15 22:00:16,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=1016, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:00:16,309 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:16,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 1 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:16,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-15 22:00:16,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 210. [2022-03-15 22:00:16,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.411483253588517) internal successors, (504), 209 states have internal predecessors, (504), 0 states have call successors, (0), 0 states 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 22:00:16,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 504 transitions. [2022-03-15 22:00:16,312 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 504 transitions. Word has length 24 [2022-03-15 22:00:16,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:16,313 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 504 transitions. [2022-03-15 22:00:16,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 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 22:00:16,313 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 504 transitions. [2022-03-15 22:00:16,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:16,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:16,313 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:16,349 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 22:00:16,527 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,SelfDestructingSolverStorable27 [2022-03-15 22:00:16,527 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:16,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1192290818, now seen corresponding path program 27 times [2022-03-15 22:00:16,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:16,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357455689] [2022-03-15 22:00:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:16,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:16,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:16,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:16,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357455689] [2022-03-15 22:00:16,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357455689] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:16,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95694446] [2022-03-15 22:00:16,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:00:16,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:16,734 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 22:00:16,735 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 22:00:16,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:00:16,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:16,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:00:16,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:17,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:17,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 82 [2022-03-15 22:00:18,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:18,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:18,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:18,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:18,340 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:18,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 131 [2022-03-15 22:00:19,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:19,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:21,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:21,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:21,752 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 22:00:21,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 18 case distinctions, treesize of input 62 treesize of output 144 [2022-03-15 22:00:21,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:21,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 167 [2022-03-15 22:00:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:24,877 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95694446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:24,877 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:24,877 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 22:00:24,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2036488999] [2022-03-15 22:00:24,878 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:24,880 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:24,884 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:00:24,884 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:25,006 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [16845#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 16846#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end))] [2022-03-15 22:00:25,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:00:25,006 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:25,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:00:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=965, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:00:25,007 INFO L87 Difference]: Start difference. First operand 210 states and 504 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 22:00:25,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:25,192 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2022-03-15 22:00:25,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:00:25,192 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:25,193 INFO L225 Difference]: With dead ends: 465 [2022-03-15 22:00:25,193 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 22:00:25,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=246, Invalid=1014, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:00:25,194 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:25,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:25,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 22:00:25,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 242. [2022-03-15 22:00:25,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4107883817427385) internal successors, (581), 241 states have internal predecessors, (581), 0 states have call successors, (0), 0 states 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 22:00:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 581 transitions. [2022-03-15 22:00:25,211 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 581 transitions. Word has length 24 [2022-03-15 22:00:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:25,211 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 581 transitions. [2022-03-15 22:00:25,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 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 22:00:25,214 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 581 transitions. [2022-03-15 22:00:25,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:25,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:25,215 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:25,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 22:00:25,424 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,SelfDestructingSolverStorable28 [2022-03-15 22:00:25,424 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:25,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:25,426 INFO L85 PathProgramCache]: Analyzing trace with hash 105975194, now seen corresponding path program 28 times [2022-03-15 22:00:25,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:25,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971921008] [2022-03-15 22:00:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:25,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:25,661 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:25,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971921008] [2022-03-15 22:00:25,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971921008] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:25,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843481342] [2022-03-15 22:00:25,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:00:25,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:25,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:25,663 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 22:00:25,664 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 22:00:25,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:00:25,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:25,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:00:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:26,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:26,001 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 22:00:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:26,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:26,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:26,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 16 [2022-03-15 22:00:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:26,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:27,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:27,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 91 [2022-03-15 22:00:27,275 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:00:27,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 157 treesize of output 231 [2022-03-15 22:00:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:30,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843481342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:30,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:30,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 22:00:30,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [98894068] [2022-03-15 22:00:30,887 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:30,889 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:30,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:00:30,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:31,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17970#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:00:31,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:00:31,002 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:31,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:00:31,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:00:31,002 INFO L87 Difference]: Start difference. First operand 242 states and 581 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 22:00:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:31,264 INFO L93 Difference]: Finished difference Result 479 states and 1148 transitions. [2022-03-15 22:00:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:00:31,264 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:31,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:31,266 INFO L225 Difference]: With dead ends: 479 [2022-03-15 22:00:31,266 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 22:00:31,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:00:31,267 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 44 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:31,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 1 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:31,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 22:00:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 281. [2022-03-15 22:00:31,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.4107142857142856) internal successors, (675), 280 states have internal predecessors, (675), 0 states have call successors, (0), 0 states 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 22:00:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 675 transitions. [2022-03-15 22:00:31,273 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 675 transitions. Word has length 24 [2022-03-15 22:00:31,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:31,273 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 675 transitions. [2022-03-15 22:00:31,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 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 22:00:31,273 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 675 transitions. [2022-03-15 22:00:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:31,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:31,274 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:31,294 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 22:00:31,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:31,474 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:31,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:31,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1893152290, now seen corresponding path program 29 times [2022-03-15 22:00:31,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:31,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432221730] [2022-03-15 22:00:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:31,848 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:31,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432221730] [2022-03-15 22:00:31,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432221730] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:31,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136469765] [2022-03-15 22:00:31,849 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:00:31,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:31,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:31,850 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 22:00:31,851 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 22:00:31,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:00:31,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:00:31,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:32,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:32,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 85 [2022-03-15 22:00:32,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:32,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:32,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:32,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 22:00:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:32,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:33,250 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:00:33,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 77 treesize of output 191 [2022-03-15 22:00:33,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:33,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 180 [2022-03-15 22:00:36,114 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:36,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136469765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:36,115 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:36,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 22:00:36,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [313260711] [2022-03-15 22:00:36,115 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:36,117 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:36,121 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:00:36,121 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:36,263 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19185#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:00:36,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:00:36,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:36,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:00:36,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:00:36,264 INFO L87 Difference]: Start difference. First operand 281 states and 675 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:36,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:36,549 INFO L93 Difference]: Finished difference Result 526 states and 1254 transitions. [2022-03-15 22:00:36,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:00:36,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:36,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:36,551 INFO L225 Difference]: With dead ends: 526 [2022-03-15 22:00:36,551 INFO L226 Difference]: Without dead ends: 508 [2022-03-15 22:00:36,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:00:36,552 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 68 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:36,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 1 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:36,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-15 22:00:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 267. [2022-03-15 22:00:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.417293233082707) internal successors, (643), 266 states have internal predecessors, (643), 0 states have call successors, (0), 0 states 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 22:00:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 643 transitions. [2022-03-15 22:00:36,556 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 643 transitions. Word has length 24 [2022-03-15 22:00:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:36,557 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 643 transitions. [2022-03-15 22:00:36,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:36,557 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 643 transitions. [2022-03-15 22:00:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:36,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:36,557 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:36,588 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 22:00:36,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:36,758 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:36,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:36,758 INFO L85 PathProgramCache]: Analyzing trace with hash 572326002, now seen corresponding path program 30 times [2022-03-15 22:00:36,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:36,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721730309] [2022-03-15 22:00:36,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:36,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:36,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:36,990 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:36,991 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:36,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721730309] [2022-03-15 22:00:36,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721730309] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:36,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898206746] [2022-03-15 22:00:36,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:00:36,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:36,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:36,992 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 22:00:36,993 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 22:00:37,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:00:37,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:37,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:00:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:37,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:37,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 22:00:37,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:37,763 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:37,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 66 treesize of output 148 [2022-03-15 22:00:41,281 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:41,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:42,743 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 22:00:42,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 97 [2022-03-15 22:00:42,768 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:42,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 128 [2022-03-15 22:00:43,466 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:43,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898206746] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:43,467 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:43,467 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-03-15 22:00:43,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [457227959] [2022-03-15 22:00:43,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:43,469 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:43,476 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:00:43,476 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:43,788 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20425#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:00:43,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:00:43,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:43,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:00:43,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:00:43,789 INFO L87 Difference]: Start difference. First operand 267 states and 643 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:44,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:44,003 INFO L93 Difference]: Finished difference Result 483 states and 1153 transitions. [2022-03-15 22:00:44,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:00:44,003 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:44,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:44,005 INFO L225 Difference]: With dead ends: 483 [2022-03-15 22:00:44,005 INFO L226 Difference]: Without dead ends: 474 [2022-03-15 22:00:44,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:00:44,006 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:44,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:44,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-15 22:00:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 265. [2022-03-15 22:00:44,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.428030303030303) internal successors, (641), 264 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:44,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 641 transitions. [2022-03-15 22:00:44,011 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 641 transitions. Word has length 24 [2022-03-15 22:00:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:44,011 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 641 transitions. [2022-03-15 22:00:44,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:00:44,011 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 641 transitions. [2022-03-15 22:00:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:00:44,012 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:44,012 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:44,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-15 22:00:44,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:44,229 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:44,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:44,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1726384446, now seen corresponding path program 31 times [2022-03-15 22:00:44,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:44,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15426516] [2022-03-15 22:00:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:44,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:44,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:44,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15426516] [2022-03-15 22:00:44,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15426516] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:44,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132772364] [2022-03-15 22:00:44,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:00:44,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:44,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:44,495 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 22:00:44,496 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 22:00:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:44,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:00:44,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:44,848 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:44,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 87 [2022-03-15 22:00:45,078 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 22:00:45,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 16 [2022-03-15 22:00:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:45,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:45,703 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:00:45,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 76 treesize of output 190 [2022-03-15 22:00:45,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:45,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 179 [2022-03-15 22:00:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:47,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132772364] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:47,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:47,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-15 22:00:47,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1572861834] [2022-03-15 22:00:47,542 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:47,544 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:47,550 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 60 transitions. [2022-03-15 22:00:47,550 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:47,990 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21609#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:00:47,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:00:47,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:47,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:00:47,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:00:47,991 INFO L87 Difference]: Start difference. First operand 265 states and 641 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 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 22:00:48,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:48,239 INFO L93 Difference]: Finished difference Result 493 states and 1177 transitions. [2022-03-15 22:00:48,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:00:48,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-15 22:00:48,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:48,241 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:00:48,241 INFO L226 Difference]: Without dead ends: 484 [2022-03-15 22:00:48,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:00:48,242 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:48,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:00:48,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-03-15 22:00:48,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 270. [2022-03-15 22:00:48,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.4275092936802976) internal successors, (653), 269 states have internal predecessors, (653), 0 states have call successors, (0), 0 states 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 22:00:48,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 653 transitions. [2022-03-15 22:00:48,247 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 653 transitions. Word has length 24 [2022-03-15 22:00:48,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:48,247 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 653 transitions. [2022-03-15 22:00:48,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 15 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 22:00:48,247 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 653 transitions. [2022-03-15 22:00:48,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 22:00:48,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:48,248 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:48,283 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 22:00:48,476 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,SelfDestructingSolverStorable32 [2022-03-15 22:00:48,477 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:48,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:48,477 INFO L85 PathProgramCache]: Analyzing trace with hash 2068367090, now seen corresponding path program 32 times [2022-03-15 22:00:48,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:48,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382446391] [2022-03-15 22:00:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:48,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:48,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:00:48,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:48,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382446391] [2022-03-15 22:00:48,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382446391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:48,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185801577] [2022-03-15 22:00:48,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:00:48,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:48,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:48,533 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 22:00:48,534 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 22:00:48,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:00:48,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:48,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:00:48,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:48,599 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:00:48,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:00:48,646 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:00:48,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185801577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:00:48,647 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:00:48,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 22:00:48,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1347099722] [2022-03-15 22:00:48,647 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:00:48,649 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:00:48,654 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 38 transitions. [2022-03-15 22:00:48,654 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:00:48,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:00:48,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 22:00:48,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:00:48,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 22:00:48,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:00:48,674 INFO L87 Difference]: Start difference. First operand 270 states and 653 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 22:00:48,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:00:48,738 INFO L93 Difference]: Finished difference Result 451 states and 1044 transitions. [2022-03-15 22:00:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:00:48,738 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-03-15 22:00:48,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:00:48,739 INFO L225 Difference]: With dead ends: 451 [2022-03-15 22:00:48,739 INFO L226 Difference]: Without dead ends: 430 [2022-03-15 22:00:48,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:00:48,740 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 64 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:00:48,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 0 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:00:48,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-03-15 22:00:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 338. [2022-03-15 22:00:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.4451038575667656) internal successors, (824), 337 states have internal predecessors, (824), 0 states have call successors, (0), 0 states 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 22:00:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 824 transitions. [2022-03-15 22:00:48,745 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 824 transitions. Word has length 26 [2022-03-15 22:00:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:00:48,745 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 824 transitions. [2022-03-15 22:00:48,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 22:00:48,745 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 824 transitions. [2022-03-15 22:00:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:00:48,746 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:00:48,746 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:00:48,775 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 22:00:48,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:48,974 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:00:48,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:00:48,975 INFO L85 PathProgramCache]: Analyzing trace with hash 23776897, now seen corresponding path program 33 times [2022-03-15 22:00:48,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:00:48,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939125387] [2022-03-15 22:00:48,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:00:48,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:00:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:00:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:00:49,255 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:00:49,255 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939125387] [2022-03-15 22:00:49,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939125387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:00:49,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122211609] [2022-03-15 22:00:49,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:00:49,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:00:49,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:00:49,257 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 22:00:49,257 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 22:00:49,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:00:49,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:00:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:00:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:00:50,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:50,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:00:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:00:51,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:00:51,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:00:51,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 24 case distinctions, treesize of input 75 treesize of output 221 [2022-03-15 22:00:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:00:57,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:10,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:10,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:10,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:10,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:10,323 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:01:10,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 72 treesize of output 190 [2022-03-15 22:01:10,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:10,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 240 [2022-03-15 22:01:23,413 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:23,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122211609] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:23,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:23,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 40 [2022-03-15 22:01:23,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1936194211] [2022-03-15 22:01:23,414 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:23,417 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:23,443 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:01:23,443 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:23,636 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24134#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:01:23,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:01:23,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:01:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1522, Unknown=3, NotChecked=0, Total=1806 [2022-03-15 22:01:23,637 INFO L87 Difference]: Start difference. First operand 338 states and 824 transitions. Second operand has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:23,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:23,940 INFO L93 Difference]: Finished difference Result 981 states and 2376 transitions. [2022-03-15 22:01:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:01:23,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:01:23,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:23,945 INFO L225 Difference]: With dead ends: 981 [2022-03-15 22:01:23,945 INFO L226 Difference]: Without dead ends: 939 [2022-03-15 22:01:23,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=322, Invalid=1745, Unknown=3, NotChecked=0, Total=2070 [2022-03-15 22:01:23,946 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:23,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:01:23,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-15 22:01:23,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 292. [2022-03-15 22:01:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.457044673539519) internal successors, (715), 291 states have internal predecessors, (715), 0 states have call successors, (0), 0 states 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 22:01:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 715 transitions. [2022-03-15 22:01:23,952 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 715 transitions. Word has length 28 [2022-03-15 22:01:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:23,952 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 715 transitions. [2022-03-15 22:01:23,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.466666666666667) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 715 transitions. [2022-03-15 22:01:23,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:01:23,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:23,952 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:23,968 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 22:01:24,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:24,156 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 939149741, now seen corresponding path program 34 times [2022-03-15 22:01:24,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:24,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340882789] [2022-03-15 22:01:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:01:24,480 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:24,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340882789] [2022-03-15 22:01:24,480 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340882789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:24,480 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426073504] [2022-03-15 22:01:24,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:24,482 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 22:01:24,485 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 22:01:24,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:24,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:24,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:01:24,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:25,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:25,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:01:25,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:25,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:01:25,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:25,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:27,167 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:01:27,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:01:27,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:27,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:01:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:31,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426073504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:31,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:31,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-03-15 22:01:31,293 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [840774631] [2022-03-15 22:01:31,293 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:31,296 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:31,302 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:01:31,302 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:31,483 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [25909#(and (<= end (+ 2 start)) (<= (select queue start) v_old) ok (<= (select A i) (select queue (+ start 1))) (<= (select queue (+ start 1)) (select queue start)) (<= (+ 2 start) end)), 25908#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:01:31,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:01:31,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:31,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:01:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:01:31,484 INFO L87 Difference]: Start difference. First operand 292 states and 715 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 22:01:31,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:31,844 INFO L93 Difference]: Finished difference Result 472 states and 1089 transitions. [2022-03-15 22:01:31,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:01:31,844 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:01:31,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:31,846 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:01:31,846 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 22:01:31,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:01:31,846 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 59 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:31,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 1 Invalid, 661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:01:31,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 22:01:31,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 274. [2022-03-15 22:01:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.4358974358974357) internal successors, (665), 273 states have internal predecessors, (665), 0 states have call successors, (0), 0 states 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 22:01:31,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 665 transitions. [2022-03-15 22:01:31,851 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 665 transitions. Word has length 28 [2022-03-15 22:01:31,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:31,851 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 665 transitions. [2022-03-15 22:01:31,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 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 22:01:31,851 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 665 transitions. [2022-03-15 22:01:31,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:01:31,852 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:31,852 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:31,886 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 22:01:32,059 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,SelfDestructingSolverStorable35 [2022-03-15 22:01:32,059 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:32,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 514838505, now seen corresponding path program 35 times [2022-03-15 22:01:32,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:32,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970029373] [2022-03-15 22:01:32,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:32,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:32,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:32,366 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:32,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:32,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970029373] [2022-03-15 22:01:32,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970029373] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:32,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437057766] [2022-03-15 22:01:32,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:32,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:32,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:32,371 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 22:01:32,371 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 22:01:32,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 22:01:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:01:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:32,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:32,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:01:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:33,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:01:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:33,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:35,007 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:01:35,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:01:35,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:35,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:01:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:46,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437057766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:46,674 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:46,674 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 22:01:46,674 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984886712] [2022-03-15 22:01:46,674 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:46,682 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:46,690 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:01:46,690 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:46,819 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27137#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:01:46,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:01:46,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:46,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:01:46,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:01:46,820 INFO L87 Difference]: Start difference. First operand 274 states and 665 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:47,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:47,031 INFO L93 Difference]: Finished difference Result 493 states and 1180 transitions. [2022-03-15 22:01:47,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:01:47,045 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:01:47,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:47,047 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:01:47,047 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 22:01:47,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:01:47,047 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:47,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:01:47,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 22:01:47,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2022-03-15 22:01:47,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.426621160409556) internal successors, (711), 293 states have internal predecessors, (711), 0 states have call successors, (0), 0 states 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 22:01:47,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 711 transitions. [2022-03-15 22:01:47,055 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 711 transitions. Word has length 28 [2022-03-15 22:01:47,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:47,055 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 711 transitions. [2022-03-15 22:01:47,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:47,056 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 711 transitions. [2022-03-15 22:01:47,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:01:47,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:47,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:47,072 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 22:01:47,263 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,SelfDestructingSolverStorable36 [2022-03-15 22:01:47,263 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:47,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1992951695, now seen corresponding path program 36 times [2022-03-15 22:01:47,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:47,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735583067] [2022-03-15 22:01:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:47,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:47,612 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:47,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:47,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735583067] [2022-03-15 22:01:47,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735583067] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:47,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053822279] [2022-03-15 22:01:47,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:47,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:47,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:47,614 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 22:01:47,614 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 22:01:47,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:01:47,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:47,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:01:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:48,057 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:48,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:01:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:48,596 INFO L353 Elim1Store]: treesize reduction 30, result has 85.4 percent of original size [2022-03-15 22:01:48,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 19 case distinctions, treesize of input 75 treesize of output 201 [2022-03-15 22:01:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:53,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:09,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:09,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:09,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:09,465 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:02:09,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 72 treesize of output 190 [2022-03-15 22:02:39,091 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:39,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053822279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:39,092 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:39,092 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2022-03-15 22:02:39,092 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1322196350] [2022-03-15 22:02:39,092 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:39,118 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:39,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:02:39,125 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:39,253 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28431#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:02:39,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:02:39,253 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:02:39,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1807, Unknown=2, NotChecked=0, Total=2162 [2022-03-15 22:02:39,254 INFO L87 Difference]: Start difference. First operand 294 states and 711 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 22:02:39,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:39,531 INFO L93 Difference]: Finished difference Result 629 states and 1501 transitions. [2022-03-15 22:02:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:02:39,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 28 [2022-03-15 22:02:39,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:39,533 INFO L225 Difference]: With dead ends: 629 [2022-03-15 22:02:39,533 INFO L226 Difference]: Without dead ends: 601 [2022-03-15 22:02:39,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=405, Invalid=2043, Unknown=2, NotChecked=0, Total=2450 [2022-03-15 22:02:39,534 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 101 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:39,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 1 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:39,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-03-15 22:02:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 274. [2022-03-15 22:02:39,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.421245421245421) internal successors, (661), 273 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 22:02:39,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 661 transitions. [2022-03-15 22:02:39,538 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 661 transitions. Word has length 28 [2022-03-15 22:02:39,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:39,539 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 661 transitions. [2022-03-15 22:02:39,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 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 22:02:39,539 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 661 transitions. [2022-03-15 22:02:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:39,539 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:39,539 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:39,565 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 22:02:39,754 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,SelfDestructingSolverStorable37 [2022-03-15 22:02:39,755 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:39,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:39,755 INFO L85 PathProgramCache]: Analyzing trace with hash 981189313, now seen corresponding path program 37 times [2022-03-15 22:02:39,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:39,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554304223] [2022-03-15 22:02:39,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:39,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:39,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:40,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:40,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:40,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554304223] [2022-03-15 22:02:40,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554304223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:40,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118278243] [2022-03-15 22:02:40,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:40,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:40,069 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 22:02:40,070 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 22:02:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:40,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:02:40,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:40,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:40,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:02:40,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:40,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:40,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:40,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:02:40,902 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:40,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:42,090 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:02:42,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:02:42,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:42,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:02:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:47,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118278243] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:47,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:47,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 22:02:47,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1509517109] [2022-03-15 22:02:47,455 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:47,458 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:47,465 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:02:47,465 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:47,737 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29816#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:02:47,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:02:47,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:47,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:02:47,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:02:47,738 INFO L87 Difference]: Start difference. First operand 274 states and 661 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 22:02:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:47,982 INFO L93 Difference]: Finished difference Result 574 states and 1370 transitions. [2022-03-15 22:02:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:02:47,982 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 28 [2022-03-15 22:02:47,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:47,984 INFO L225 Difference]: With dead ends: 574 [2022-03-15 22:02:47,984 INFO L226 Difference]: Without dead ends: 551 [2022-03-15 22:02:47,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:02:47,984 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:47,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-15 22:02:47,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 244. [2022-03-15 22:02:47,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.432098765432099) internal successors, (591), 243 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:02:47,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 591 transitions. [2022-03-15 22:02:47,988 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 591 transitions. Word has length 28 [2022-03-15 22:02:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:47,988 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 591 transitions. [2022-03-15 22:02:47,989 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 22:02:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 591 transitions. [2022-03-15 22:02:47,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:47,989 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:47,989 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:48,007 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-15 22:02:48,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-15 22:02:48,195 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:48,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1317521135, now seen corresponding path program 38 times [2022-03-15 22:02:48,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:48,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444689058] [2022-03-15 22:02:48,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:02:48,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:48,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444689058] [2022-03-15 22:02:48,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444689058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:48,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131730596] [2022-03-15 22:02:48,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:02:48,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:48,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:48,555 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 22:02:48,591 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 22:02:48,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:02:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:48,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:02:48,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:49,187 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:49,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:03:00,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:00,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:00,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:00,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 51 treesize of output 113 [2022-03-15 22:03:01,594 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:01,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:09,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:10,119 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:03:10,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 94 treesize of output 276 [2022-03-15 22:03:10,179 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:10,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 291 [2022-03-15 22:03:29,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:29,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131730596] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:29,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:29,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:03:29,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1118822108] [2022-03-15 22:03:29,274 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:29,276 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:29,284 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:03:29,284 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:29,666 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31089#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:03:29,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:03:29,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:29,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:03:29,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1641, Unknown=2, NotChecked=0, Total=1980 [2022-03-15 22:03:29,667 INFO L87 Difference]: Start difference. First operand 244 states and 591 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:29,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:29,978 INFO L93 Difference]: Finished difference Result 489 states and 1155 transitions. [2022-03-15 22:03:29,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:03:29,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:03:29,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:29,979 INFO L225 Difference]: With dead ends: 489 [2022-03-15 22:03:29,979 INFO L226 Difference]: Without dead ends: 462 [2022-03-15 22:03:29,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=361, Invalid=1799, Unknown=2, NotChecked=0, Total=2162 [2022-03-15 22:03:29,980 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:29,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 1 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:03:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-15 22:03:29,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 230. [2022-03-15 22:03:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.432314410480349) internal successors, (557), 229 states have internal predecessors, (557), 0 states have call successors, (0), 0 states 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 22:03:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 557 transitions. [2022-03-15 22:03:29,984 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 557 transitions. Word has length 28 [2022-03-15 22:03:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:29,984 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 557 transitions. [2022-03-15 22:03:29,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 557 transitions. [2022-03-15 22:03:29,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:29,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:29,984 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:30,002 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 22:03:30,199 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,SelfDestructingSolverStorable39 [2022-03-15 22:03:30,199 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:30,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:30,200 INFO L85 PathProgramCache]: Analyzing trace with hash 272044009, now seen corresponding path program 39 times [2022-03-15 22:03:30,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:30,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434750062] [2022-03-15 22:03:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:30,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:03:30,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:30,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434750062] [2022-03-15 22:03:30,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434750062] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:30,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089879308] [2022-03-15 22:03:30,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:03:30,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:30,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:30,506 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 22:03:30,507 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 22:03:30,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:03:30,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:30,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:03:30,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:32,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:32,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:03:33,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:33,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:33,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 153 [2022-03-15 22:03:34,192 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:34,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:35,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:35,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:35,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:35,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:35,800 INFO L353 Elim1Store]: treesize reduction 22, result has 81.2 percent of original size [2022-03-15 22:03:35,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 94 treesize of output 142 [2022-03-15 22:03:35,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:35,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 189 [2022-03-15 22:03:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:37,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089879308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:37,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:37,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:03:37,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1157235257] [2022-03-15 22:03:37,570 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:37,573 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:37,579 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:03:37,579 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:37,663 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32247#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:03:37,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:03:37,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:37,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:03:37,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:03:37,664 INFO L87 Difference]: Start difference. First operand 230 states and 557 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 22:03:37,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:37,915 INFO L93 Difference]: Finished difference Result 435 states and 1004 transitions. [2022-03-15 22:03:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:03:37,915 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 28 [2022-03-15 22:03:37,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:37,916 INFO L225 Difference]: With dead ends: 435 [2022-03-15 22:03:37,916 INFO L226 Difference]: Without dead ends: 376 [2022-03-15 22:03:37,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:03:37,917 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:37,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 1 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:03:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-15 22:03:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 257. [2022-03-15 22:03:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.43359375) internal successors, (623), 256 states have internal predecessors, (623), 0 states have call successors, (0), 0 states 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 22:03:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 623 transitions. [2022-03-15 22:03:37,920 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 623 transitions. Word has length 28 [2022-03-15 22:03:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:37,920 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 623 transitions. [2022-03-15 22:03:37,920 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 22:03:37,920 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 623 transitions. [2022-03-15 22:03:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:37,921 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:37,921 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:37,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-15 22:03:38,135 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,SelfDestructingSolverStorable40 [2022-03-15 22:03:38,135 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:38,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1618573871, now seen corresponding path program 40 times [2022-03-15 22:03:38,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:38,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760152190] [2022-03-15 22:03:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:03:38,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:38,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760152190] [2022-03-15 22:03:38,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760152190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:38,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724826684] [2022-03-15 22:03:38,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:03:38,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:38,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:38,496 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 22:03:38,497 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 22:03:38,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:03:38,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:38,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:03:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:39,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:39,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 128 [2022-03-15 22:03:39,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:39,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:39,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:03:39,767 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:39,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:41,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:41,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 134 [2022-03-15 22:03:41,389 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:03:41,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 237 treesize of output 357 [2022-03-15 22:03:52,440 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:52,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724826684] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:52,440 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:52,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 22:03:52,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831056420] [2022-03-15 22:03:52,440 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:52,443 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:52,450 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:03:52,450 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:52,871 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33401#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:03:52,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:03:52,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:03:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:03:52,872 INFO L87 Difference]: Start difference. First operand 257 states and 623 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:53,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:53,291 INFO L93 Difference]: Finished difference Result 816 states and 1947 transitions. [2022-03-15 22:03:53,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:03:53,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:03:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:53,293 INFO L225 Difference]: With dead ends: 816 [2022-03-15 22:03:53,293 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 22:03:53,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:03:53,295 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:53,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:03:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 22:03:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 283. [2022-03-15 22:03:53,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.4361702127659575) internal successors, (687), 282 states have internal predecessors, (687), 0 states have call successors, (0), 0 states 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 22:03:53,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 687 transitions. [2022-03-15 22:03:53,300 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 687 transitions. Word has length 28 [2022-03-15 22:03:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:53,300 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 687 transitions. [2022-03-15 22:03:53,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:03:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 687 transitions. [2022-03-15 22:03:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:53,301 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:53,301 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:53,319 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 22:03:53,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-15 22:03:53,515 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash 905320877, now seen corresponding path program 41 times [2022-03-15 22:03:53,517 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:53,517 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010690441] [2022-03-15 22:03:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:53,920 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:03:53,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010690441] [2022-03-15 22:03:53,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010690441] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:53,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293599363] [2022-03-15 22:03:53,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:03:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:53,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:53,921 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 22:03:53,922 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 22:03:53,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:03:53,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:53,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:03:53,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:54,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:54,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 137 [2022-03-15 22:03:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:55,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:55,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:55,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:55,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:55,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:55,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 30 [2022-03-15 22:03:55,499 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:55,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:57,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:57,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 135 [2022-03-15 22:03:57,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,318 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:57,408 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:57,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 238 treesize of output 286 [2022-03-15 22:03:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:59,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293599363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:59,386 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:59,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 42 [2022-03-15 22:03:59,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [543713908] [2022-03-15 22:03:59,386 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:59,389 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:59,395 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:03:59,395 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:59,667 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [34922#(or (not (< start end)) (and (<= (select queue start) v_old) ok)), 34996#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:03:59,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:03:59,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:59,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:03:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1597, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:03:59,668 INFO L87 Difference]: Start difference. First operand 283 states and 687 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 22:04:00,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:00,083 INFO L93 Difference]: Finished difference Result 561 states and 1327 transitions. [2022-03-15 22:04:00,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:04:00,083 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:00,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:00,085 INFO L225 Difference]: With dead ends: 561 [2022-03-15 22:04:00,085 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 22:04:00,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=410, Invalid=1660, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:04:00,085 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:00,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:04:00,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 22:04:00,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 318. [2022-03-15 22:04:00,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.451104100946372) internal successors, (777), 317 states have internal predecessors, (777), 0 states have call successors, (0), 0 states 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 22:04:00,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 777 transitions. [2022-03-15 22:04:00,090 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 777 transitions. Word has length 28 [2022-03-15 22:04:00,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:00,091 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 777 transitions. [2022-03-15 22:04:00,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 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 22:04:00,091 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 777 transitions. [2022-03-15 22:04:00,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:00,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:00,091 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:00,116 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 22:04:00,292 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,SelfDestructingSolverStorable42 [2022-03-15 22:04:00,292 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:00,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:00,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1194208867, now seen corresponding path program 42 times [2022-03-15 22:04:00,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:00,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231545806] [2022-03-15 22:04:00,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:00,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:00,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:00,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231545806] [2022-03-15 22:04:00,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231545806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:00,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483960974] [2022-03-15 22:04:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:04:00,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:00,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:00,636 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 22:04:00,637 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 22:04:00,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:04:00,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:00,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:00,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:02,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:02,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 126 [2022-03-15 22:04:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:03,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:03,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 18 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 18 case distinctions, treesize of input 88 treesize of output 220 [2022-03-15 22:04:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:09,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:21,795 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:21,853 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:21,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 123 [2022-03-15 22:04:21,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:21,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 183 [2022-03-15 22:04:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:22,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483960974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:22,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:22,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 39 [2022-03-15 22:04:22,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1156919256] [2022-03-15 22:04:22,719 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:22,722 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:22,728 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:04:22,728 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:23,001 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [36399#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start))), 36400#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:04:23,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:04:23,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:23,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:04:23,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=1482, Unknown=3, NotChecked=0, Total=1806 [2022-03-15 22:04:23,002 INFO L87 Difference]: Start difference. First operand 318 states and 777 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 22:04:23,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:23,361 INFO L93 Difference]: Finished difference Result 682 states and 1600 transitions. [2022-03-15 22:04:23,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:04:23,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:23,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:23,364 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:04:23,364 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 22:04:23,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=346, Invalid=1543, Unknown=3, NotChecked=0, Total=1892 [2022-03-15 22:04:23,364 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:23,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 716 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:23,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 22:04:23,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 368. [2022-03-15 22:04:23,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.446866485013624) internal successors, (898), 367 states have internal predecessors, (898), 0 states have call successors, (0), 0 states 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 22:04:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 898 transitions. [2022-03-15 22:04:23,370 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 898 transitions. Word has length 28 [2022-03-15 22:04:23,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:23,370 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 898 transitions. [2022-03-15 22:04:23,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 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 22:04:23,370 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 898 transitions. [2022-03-15 22:04:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:23,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:23,371 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:23,387 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 22:04:23,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:23,588 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:23,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1164116201, now seen corresponding path program 43 times [2022-03-15 22:04:23,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:23,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687309043] [2022-03-15 22:04:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:23,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:24,098 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:24,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:24,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687309043] [2022-03-15 22:04:24,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687309043] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:24,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027632152] [2022-03-15 22:04:24,099 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:04:24,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:24,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:24,100 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 22:04:24,101 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 22:04:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:24,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:24,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:24,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 129 [2022-03-15 22:04:25,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:25,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:25,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:04:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:25,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:26,884 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:04:26,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 97 treesize of output 287 [2022-03-15 22:04:26,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:26,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 272 treesize of output 292 [2022-03-15 22:04:35,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:35,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027632152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:35,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:35,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2022-03-15 22:04:35,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [95203443] [2022-03-15 22:04:35,880 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:35,882 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:35,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:04:35,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:35,982 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38026#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:04:35,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:35,982 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:35,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:04:35,983 INFO L87 Difference]: Start difference. First operand 368 states and 898 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:36,363 INFO L93 Difference]: Finished difference Result 682 states and 1659 transitions. [2022-03-15 22:04:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:04:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:04:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:36,365 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:04:36,365 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 22:04:36,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:04:36,367 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:36,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 1 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 22:04:36,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 431. [2022-03-15 22:04:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 430 states have (on average 2.437209302325581) internal successors, (1048), 430 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states 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 22:04:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1048 transitions. [2022-03-15 22:04:36,401 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1048 transitions. Word has length 28 [2022-03-15 22:04:36,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:36,401 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1048 transitions. [2022-03-15 22:04:36,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:04:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1048 transitions. [2022-03-15 22:04:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:36,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:36,402 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:36,422 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 22:04:36,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:36,602 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:36,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1343673999, now seen corresponding path program 44 times [2022-03-15 22:04:36,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:36,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047539891] [2022-03-15 22:04:36,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:37,034 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:37,035 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:37,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047539891] [2022-03-15 22:04:37,035 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047539891] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:37,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252625279] [2022-03-15 22:04:37,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:04:37,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:37,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:37,036 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 22:04:37,039 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 22:04:37,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:04:37,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:37,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:04:37,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:37,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:37,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:04:42,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:42,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:42,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:42,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 51 treesize of output 113 [2022-03-15 22:04:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:04:44,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:54,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:54,449 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:04:54,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 44 case distinctions, treesize of input 94 treesize of output 276 [2022-03-15 22:04:54,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:54,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 271 treesize of output 291 [2022-03-15 22:05:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:40,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252625279] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:40,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:40,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:05:40,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [23003061] [2022-03-15 22:05:40,882 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:40,884 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:40,891 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:05:40,891 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:41,062 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39781#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:05:41,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:05:41,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:41,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:05:41,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1762, Unknown=1, NotChecked=0, Total=2162 [2022-03-15 22:05:41,063 INFO L87 Difference]: Start difference. First operand 431 states and 1048 transitions. Second operand has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 22:05:41,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:41,524 INFO L93 Difference]: Finished difference Result 750 states and 1817 transitions. [2022-03-15 22:05:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:05:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 28 [2022-03-15 22:05:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:41,527 INFO L225 Difference]: With dead ends: 750 [2022-03-15 22:05:41,527 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 22:05:41,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=459, Invalid=1892, Unknown=1, NotChecked=0, Total=2352 [2022-03-15 22:05:41,527 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:41,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:05:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 22:05:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 405. [2022-03-15 22:05:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.4405940594059405) internal successors, (986), 404 states have internal predecessors, (986), 0 states have call successors, (0), 0 states 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 22:05:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 986 transitions. [2022-03-15 22:05:41,533 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 986 transitions. Word has length 28 [2022-03-15 22:05:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:41,533 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 986 transitions. [2022-03-15 22:05:41,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0) internal successors, (36), 18 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 22:05:41,533 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 986 transitions. [2022-03-15 22:05:41,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:41,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:41,534 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:41,550 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 22:05:41,747 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,SelfDestructingSolverStorable45 [2022-03-15 22:05:41,748 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:41,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1630467009, now seen corresponding path program 45 times [2022-03-15 22:05:41,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:41,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055187615] [2022-03-15 22:05:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:41,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:42,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:42,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055187615] [2022-03-15 22:05:42,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055187615] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:42,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196724055] [2022-03-15 22:05:42,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:05:42,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:42,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:42,168 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 22:05:42,169 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 22:05:42,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:05:42,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:42,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:05:42,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:42,956 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:42,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:05:43,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:43,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:44,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:44,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 19 case distinctions, treesize of input 64 treesize of output 186 [2022-03-15 22:05:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:05:46,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:53,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:53,997 INFO L353 Elim1Store]: treesize reduction 88, result has 69.1 percent of original size [2022-03-15 22:05:53,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 83 treesize of output 241 [2022-03-15 22:05:54,053 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:54,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 267 treesize of output 283 [2022-03-15 22:06:42,451 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:42,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196724055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:42,452 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:42,452 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:06:42,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [530392648] [2022-03-15 22:06:42,452 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:42,455 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:42,462 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:06:42,462 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:42,732 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41554#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:06:42,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:42,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:06:42,751 INFO L87 Difference]: Start difference. First operand 405 states and 986 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:43,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:43,127 INFO L93 Difference]: Finished difference Result 705 states and 1714 transitions. [2022-03-15 22:06:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:06:43,127 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:06:43,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:43,129 INFO L225 Difference]: With dead ends: 705 [2022-03-15 22:06:43,129 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 22:06:43,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=415, Invalid=1841, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:06:43,130 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 84 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:43,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 1 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:06:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 22:06:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 397. [2022-03-15 22:06:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.4494949494949494) internal successors, (970), 396 states have internal predecessors, (970), 0 states have call successors, (0), 0 states 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 22:06:43,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 970 transitions. [2022-03-15 22:06:43,136 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 970 transitions. Word has length 28 [2022-03-15 22:06:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:43,136 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 970 transitions. [2022-03-15 22:06:43,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:43,136 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 970 transitions. [2022-03-15 22:06:43,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:43,136 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:43,137 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:43,152 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 22:06:43,353 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,SelfDestructingSolverStorable46 [2022-03-15 22:06:43,353 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:43,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:43,353 INFO L85 PathProgramCache]: Analyzing trace with hash -668243439, now seen corresponding path program 46 times [2022-03-15 22:06:43,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:43,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512934600] [2022-03-15 22:06:43,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:43,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:43,796 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:43,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:43,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512934600] [2022-03-15 22:06:43,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512934600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:43,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498114047] [2022-03-15 22:06:43,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:06:43,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:43,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:43,798 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 22:06:43,800 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 22:06:43,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:06:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:43,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:06:43,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:44,426 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:44,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 129 [2022-03-15 22:06:45,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:45,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:45,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:45,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 19 [2022-03-15 22:06:45,087 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:45,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:46,422 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:46,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 134 [2022-03-15 22:06:46,795 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:06:46,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 237 treesize of output 357 [2022-03-15 22:06:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:52,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498114047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:52,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:52,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-03-15 22:06:52,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2106553090] [2022-03-15 22:06:52,987 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:52,989 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:52,997 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:06:52,997 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:53,408 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43258#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:06:53,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:53,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:53,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:53,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:06:53,408 INFO L87 Difference]: Start difference. First operand 397 states and 970 transitions. Second operand has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:53,738 INFO L93 Difference]: Finished difference Result 673 states and 1632 transitions. [2022-03-15 22:06:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:06:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:06:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:53,740 INFO L225 Difference]: With dead ends: 673 [2022-03-15 22:06:53,740 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 22:06:53,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:06:53,741 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:53,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:06:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 22:06:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 395. [2022-03-15 22:06:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.4568527918781724) internal successors, (968), 394 states have internal predecessors, (968), 0 states have call successors, (0), 0 states 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 22:06:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 968 transitions. [2022-03-15 22:06:53,753 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 968 transitions. Word has length 28 [2022-03-15 22:06:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 968 transitions. [2022-03-15 22:06:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 968 transitions. [2022-03-15 22:06:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:53,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:53,753 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:53,770 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 22:06:53,972 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,SelfDestructingSolverStorable47 [2022-03-15 22:06:53,973 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:53,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash -2115793823, now seen corresponding path program 47 times [2022-03-15 22:06:53,975 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:53,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023788472] [2022-03-15 22:06:53,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:53,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:54,431 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:54,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:54,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023788472] [2022-03-15 22:06:54,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023788472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:54,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001353837] [2022-03-15 22:06:54,431 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:06:54,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:54,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:54,432 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:06:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-15 22:06:54,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:06:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:06:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:55,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:55,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 127 [2022-03-15 22:06:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:55,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:55,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:55,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 10 disjoint index pairs (out of 21 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 19 [2022-03-15 22:06:55,858 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:55,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:57,636 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:57,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 135 [2022-03-15 22:06:57,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:57,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:57,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 30 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 238 treesize of output 286 [2022-03-15 22:06:58,622 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:06:58,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001353837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:58,623 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:58,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 43 [2022-03-15 22:06:58,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [326545575] [2022-03-15 22:06:58,623 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:58,625 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:58,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 72 transitions. [2022-03-15 22:06:58,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:59,315 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44931#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ start 4)) (select queue (+ 3 start))) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:06:59,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:59,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:59,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1579, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:06:59,316 INFO L87 Difference]: Start difference. First operand 395 states and 968 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:59,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:59,745 INFO L93 Difference]: Finished difference Result 683 states and 1656 transitions. [2022-03-15 22:06:59,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:06:59,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-03-15 22:06:59,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:59,748 INFO L225 Difference]: With dead ends: 683 [2022-03-15 22:06:59,748 INFO L226 Difference]: Without dead ends: 674 [2022-03-15 22:06:59,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=513, Invalid=1649, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:06:59,748 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:59,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:06:59,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-15 22:06:59,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-03-15 22:06:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.456140350877193) internal successors, (980), 399 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 980 transitions. [2022-03-15 22:06:59,754 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 980 transitions. Word has length 28 [2022-03-15 22:06:59,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:59,754 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 980 transitions. [2022-03-15 22:06:59,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:06:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 980 transitions. [2022-03-15 22:06:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 22:06:59,755 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:59,755 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:59,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-15 22:06:59,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:59,961 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:59,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:59,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1034625665, now seen corresponding path program 48 times [2022-03-15 22:06:59,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:59,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993728059] [2022-03-15 22:06:59,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:59,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:00,016 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:07:00,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993728059] [2022-03-15 22:07:00,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993728059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:00,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61948376] [2022-03-15 22:07:00,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:07:00,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:00,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:00,018 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:07:00,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-15 22:07:00,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 22:07:00,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:00,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:07:00,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:00,108 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:07:00,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 41 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:07:00,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61948376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:00,177 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:00,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 22:07:00,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1631630215] [2022-03-15 22:07:00,177 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:00,180 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:00,187 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 42 transitions. [2022-03-15 22:07:00,187 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:00,208 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:07:00,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:07:00,209 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:00,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:07:00,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:00,209 INFO L87 Difference]: Start difference. First operand 400 states and 980 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:00,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:00,284 INFO L93 Difference]: Finished difference Result 659 states and 1558 transitions. [2022-03-15 22:07:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:07:00,284 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-03-15 22:07:00,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:00,289 INFO L225 Difference]: With dead ends: 659 [2022-03-15 22:07:00,289 INFO L226 Difference]: Without dead ends: 634 [2022-03-15 22:07:00,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:00,290 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:00,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:07:00,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-03-15 22:07:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 486. [2022-03-15 22:07:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 485 states have (on average 2.468041237113402) internal successors, (1197), 485 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states 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 22:07:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1197 transitions. [2022-03-15 22:07:00,296 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1197 transitions. Word has length 30 [2022-03-15 22:07:00,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:00,296 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1197 transitions. [2022-03-15 22:07:00,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:00,296 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1197 transitions. [2022-03-15 22:07:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:00,297 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:00,297 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:00,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-15 22:07:00,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-15 22:07:00,516 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash 185436320, now seen corresponding path program 49 times [2022-03-15 22:07:00,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:00,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584471361] [2022-03-15 22:07:00,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:00,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-15 22:07:00,935 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:00,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584471361] [2022-03-15 22:07:00,935 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584471361] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:00,935 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4864868] [2022-03-15 22:07:00,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:07:00,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:00,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:00,937 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:07:00,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-15 22:07:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:00,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:02,099 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:02,099 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:07:02,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:02,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:02,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:02,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:07:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:02,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:05,457 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:07:05,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:07:05,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:05,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:07:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:57,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4864868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:57,449 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:57,449 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-03-15 22:07:57,449 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [7518299] [2022-03-15 22:07:57,449 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:57,453 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:57,463 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:07:57,463 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:57,849 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48462#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:07:57,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:57,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:57,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:57,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:07:57,850 INFO L87 Difference]: Start difference. First operand 486 states and 1197 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:58,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:58,324 INFO L93 Difference]: Finished difference Result 1635 states and 4004 transitions. [2022-03-15 22:07:58,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:07:58,324 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:07:58,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:58,335 INFO L225 Difference]: With dead ends: 1635 [2022-03-15 22:07:58,335 INFO L226 Difference]: Without dead ends: 1566 [2022-03-15 22:07:58,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:07:58,336 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:58,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 1 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:07:58,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-15 22:07:58,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 408. [2022-03-15 22:07:58,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.481572481572482) internal successors, (1010), 407 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states 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 22:07:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1010 transitions. [2022-03-15 22:07:58,373 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1010 transitions. Word has length 32 [2022-03-15 22:07:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:58,373 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1010 transitions. [2022-03-15 22:07:58,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:07:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1010 transitions. [2022-03-15 22:07:58,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:58,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:58,374 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:58,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-15 22:07:58,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:58,575 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1585636228, now seen corresponding path program 50 times [2022-03-15 22:07:58,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:58,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743619983] [2022-03-15 22:07:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:58,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:07:59,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:59,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743619983] [2022-03-15 22:07:59,060 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743619983] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:59,060 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288692098] [2022-03-15 22:07:59,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:07:59,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:59,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:59,061 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:07:59,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-15 22:07:59,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:07:59,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:59,095 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:59,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:00,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:00,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:08:00,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:00,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:00,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:08:00,779 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:00,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:08:03,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:03,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 99 treesize of output 185 [2022-03-15 22:08:03,832 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:08:03,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 333 treesize of output 511 [2022-03-15 22:08:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:30,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288692098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:30,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:30,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 47 [2022-03-15 22:08:30,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [445337282] [2022-03-15 22:08:30,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:30,840 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:30,848 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:08:30,848 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:31,060 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [51157#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 51158#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:08:31,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:08:31,061 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:31,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:08:31,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2179, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:08:31,061 INFO L87 Difference]: Start difference. First operand 408 states and 1010 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:31,648 INFO L93 Difference]: Finished difference Result 919 states and 2196 transitions. [2022-03-15 22:08:31,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:08:31,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:08:31,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:31,651 INFO L225 Difference]: With dead ends: 919 [2022-03-15 22:08:31,651 INFO L226 Difference]: Without dead ends: 833 [2022-03-15 22:08:31,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=429, Invalid=2433, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:08:31,651 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:08:31,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:08:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-03-15 22:08:31,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 515. [2022-03-15 22:08:31,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.4863813229571985) internal successors, (1278), 514 states have internal predecessors, (1278), 0 states have call successors, (0), 0 states 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 22:08:31,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1278 transitions. [2022-03-15 22:08:31,674 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1278 transitions. Word has length 32 [2022-03-15 22:08:31,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:31,674 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1278 transitions. [2022-03-15 22:08:31,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:08:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1278 transitions. [2022-03-15 22:08:31,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:31,679 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:31,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:31,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-15 22:08:31,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-15 22:08:31,889 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:31,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:31,892 INFO L85 PathProgramCache]: Analyzing trace with hash 609801324, now seen corresponding path program 51 times [2022-03-15 22:08:31,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:31,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219503801] [2022-03-15 22:08:31,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:31,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:32,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-15 22:08:32,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:32,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219503801] [2022-03-15 22:08:32,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219503801] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:32,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458632185] [2022-03-15 22:08:32,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:08:32,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:32,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:32,274 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:08:32,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-15 22:08:32,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 22:08:32,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:32,313 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:08:32,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:53,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:53,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:08:53,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:53,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:53,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:54,078 INFO L353 Elim1Store]: treesize reduction 44, result has 83.4 percent of original size [2022-03-15 22:08:54,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 12 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 86 treesize of output 250 [2022-03-15 22:09:04,226 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:09:04,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:09:46,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:46,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:46,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:09:47,252 INFO L353 Elim1Store]: treesize reduction 108, result has 69.4 percent of original size [2022-03-15 22:09:47,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 3 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 39 case distinctions, treesize of input 93 treesize of output 295 [2022-03-15 22:09:47,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:09:47,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 336 treesize of output 374 [2022-03-15 22:10:17,858 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:17,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458632185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:10:17,858 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:10:17,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19, 19] total 46 [2022-03-15 22:10:17,859 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1049760791] [2022-03-15 22:10:17,859 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:10:17,861 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:10:17,869 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:10:17,870 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:10:18,088 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [53348#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start))), 53349#(and (<= (select A i) (select queue (+ 2 start))) (<= (select queue start) v_old) (<= (select queue (+ 2 start)) (select queue (+ start 1))) ok (<= (+ 3 start) end) (<= (select queue (+ start 1)) (select queue start)) (<= end (+ 3 start)))] [2022-03-15 22:10:18,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:10:18,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:10:18,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:10:18,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=2038, Unknown=15, NotChecked=0, Total=2450 [2022-03-15 22:10:18,089 INFO L87 Difference]: Start difference. First operand 515 states and 1278 transitions. Second operand has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:10:18,518 INFO L93 Difference]: Finished difference Result 782 states and 1853 transitions. [2022-03-15 22:10:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:10:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:10:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:10:18,520 INFO L225 Difference]: With dead ends: 782 [2022-03-15 22:10:18,520 INFO L226 Difference]: Without dead ends: 706 [2022-03-15 22:10:18,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 55.7s TimeCoverageRelationStatistics Valid=442, Invalid=2195, Unknown=15, NotChecked=0, Total=2652 [2022-03-15 22:10:18,520 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:10:18,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:10:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2022-03-15 22:10:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 386. [2022-03-15 22:10:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4675324675324677) internal successors, (950), 385 states have internal predecessors, (950), 0 states have call successors, (0), 0 states 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 22:10:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 950 transitions. [2022-03-15 22:10:18,525 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 950 transitions. Word has length 32 [2022-03-15 22:10:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:10:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 950 transitions. [2022-03-15 22:10:18,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.4375) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 950 transitions. [2022-03-15 22:10:18,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:10:18,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:10:18,526 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:10:18,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-15 22:10:18,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-15 22:10:18,739 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:10:18,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:10:18,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1326840904, now seen corresponding path program 52 times [2022-03-15 22:10:18,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:10:18,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778367720] [2022-03-15 22:10:18,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:10:18,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:10:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:19,200 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 22:10:19,200 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:10:19,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778367720] [2022-03-15 22:10:19,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778367720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:10:19,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020009687] [2022-03-15 22:10:19,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:10:19,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:19,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:10:19,201 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:10:19,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-15 22:10:19,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:10:19,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:10:19,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:10:19,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:10:20,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:20,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:10:21,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:21,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:21,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:10:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:21,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:10:24,006 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:10:24,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:10:24,085 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:24,085 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:10:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:51,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020009687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:10:51,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:10:51,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-03-15 22:10:51,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1536057290] [2022-03-15 22:10:51,069 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:10:51,071 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:10:51,092 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 44 transitions. [2022-03-15 22:10:51,092 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:10:51,229 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [55144#(and (or ok (<= end start)) (or (<= (select queue start) v_old) (<= end start)))] [2022-03-15 22:10:51,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:10:51,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:10:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:10:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=390, Invalid=2160, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:10:51,230 INFO L87 Difference]: Start difference. First operand 386 states and 950 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:10:51,637 INFO L93 Difference]: Finished difference Result 718 states and 1745 transitions. [2022-03-15 22:10:51,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:10:51,637 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:10:51,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:10:51,640 INFO L225 Difference]: With dead ends: 718 [2022-03-15 22:10:51,640 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 22:10:51,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=440, Invalid=2316, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:10:51,641 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:10:51,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 714 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:10:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 22:10:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 418. [2022-03-15 22:10:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.4556354916067145) internal successors, (1024), 417 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states 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 22:10:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1024 transitions. [2022-03-15 22:10:51,647 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1024 transitions. Word has length 32 [2022-03-15 22:10:51,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:10:51,647 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1024 transitions. [2022-03-15 22:10:51,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:10:51,647 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1024 transitions. [2022-03-15 22:10:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:10:51,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:10:51,651 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:10:51,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-15 22:10:51,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:51,868 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:10:51,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:10:51,868 INFO L85 PathProgramCache]: Analyzing trace with hash 460336192, now seen corresponding path program 53 times [2022-03-15 22:10:51,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:10:51,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764738300] [2022-03-15 22:10:51,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:10:51,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:10:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:52,375 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 22:10:52,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:10:52,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764738300] [2022-03-15 22:10:52,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764738300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:10:52,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337113529] [2022-03-15 22:10:52,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:10:52,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:52,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:10:52,376 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:10:52,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-15 22:10:52,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 22:10:52,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:10:52,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-15 22:10:52,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:10:53,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:53,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:10:54,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:54,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:54,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 22 [2022-03-15 22:10:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:10:54,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:10:57,043 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:10:57,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 119 treesize of output 405 [2022-03-15 22:10:57,126 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:57,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 398 treesize of output 434 [2022-03-15 22:11:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:11:18,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337113529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:11:18,128 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:11:18,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 22:11:18,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [356502155] [2022-03-15 22:11:18,128 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:11:18,131 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:11:18,155 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 52 transitions. [2022-03-15 22:11:18,155 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:11:18,330 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56938#(and (or ok (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:11:18,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:11:18,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:11:18,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:11:18,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2075, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:11:18,331 INFO L87 Difference]: Start difference. First operand 418 states and 1024 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:11:18,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:11:18,903 INFO L93 Difference]: Finished difference Result 1374 states and 3346 transitions. [2022-03-15 22:11:18,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:11:18,903 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:11:18,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:11:18,906 INFO L225 Difference]: With dead ends: 1374 [2022-03-15 22:11:18,906 INFO L226 Difference]: Without dead ends: 1346 [2022-03-15 22:11:18,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=456, Invalid=2406, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:11:18,906 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 69 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:11:18,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 1 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:11:18,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-03-15 22:11:18,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 513. [2022-03-15 22:11:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.4453125) internal successors, (1252), 512 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states 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 22:11:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1252 transitions. [2022-03-15 22:11:18,915 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1252 transitions. Word has length 32 [2022-03-15 22:11:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:11:18,915 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1252 transitions. [2022-03-15 22:11:18,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:11:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1252 transitions. [2022-03-15 22:11:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:11:18,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:11:18,916 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:11:18,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-15 22:11:19,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-15 22:11:19,117 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:11:19,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:11:19,117 INFO L85 PathProgramCache]: Analyzing trace with hash -860490096, now seen corresponding path program 54 times [2022-03-15 22:11:19,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:11:19,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879049569] [2022-03-15 22:11:19,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:11:19,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:11:19,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:11:19,585 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 22:11:19,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:11:19,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879049569] [2022-03-15 22:11:19,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879049569] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:11:19,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589471367] [2022-03-15 22:11:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:11:19,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:19,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:11:19,587 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:11:19,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-15 22:11:19,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-03-15 22:11:19,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:11:19,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:11:19,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:11:21,087 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:21,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 88 treesize of output 176 [2022-03-15 22:11:23,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:23,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:23,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 19 disjoint index pairs (out of 55 index pairs), introduced 10 new quantified variables, introduced 34 case distinctions, treesize of input 97 treesize of output 317 [2022-03-15 22:11:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:11:38,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:12:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:31,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:31,443 INFO L353 Elim1Store]: treesize reduction 40, result has 82.5 percent of original size [2022-03-15 22:12:31,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 82 treesize of output 236 [2022-03-15 22:12:31,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:31,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 277 treesize of output 323 [2022-03-15 22:12:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:12:49,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589471367] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:12:49,776 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:12:49,776 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-03-15 22:12:49,776 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [270230531] [2022-03-15 22:12:49,776 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:12:49,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:12:49,818 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 22:12:49,819 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:12:50,152 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [59586#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:12:50,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:12:50,152 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:12:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:12:50,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=2404, Unknown=16, NotChecked=0, Total=2862 [2022-03-15 22:12:50,153 INFO L87 Difference]: Start difference. First operand 513 states and 1252 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:12:50,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:12:50,640 INFO L93 Difference]: Finished difference Result 1405 states and 3429 transitions. [2022-03-15 22:12:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:12:50,640 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:12:50,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:12:50,642 INFO L225 Difference]: With dead ends: 1405 [2022-03-15 22:12:50,642 INFO L226 Difference]: Without dead ends: 1382 [2022-03-15 22:12:50,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=489, Invalid=2687, Unknown=16, NotChecked=0, Total=3192 [2022-03-15 22:12:50,643 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 79 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:12:50,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 1 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:12:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-15 22:12:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 501. [2022-03-15 22:12:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 500 states have (on average 2.448) internal successors, (1224), 500 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states 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 22:12:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 1224 transitions. [2022-03-15 22:12:50,651 INFO L78 Accepts]: Start accepts. Automaton has 501 states and 1224 transitions. Word has length 32 [2022-03-15 22:12:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:12:50,651 INFO L470 AbstractCegarLoop]: Abstraction has 501 states and 1224 transitions. [2022-03-15 22:12:50,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:12:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 501 states and 1224 transitions. [2022-03-15 22:12:50,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:12:50,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:12:50,652 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:12:50,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-15 22:12:50,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-15 22:12:50,868 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:12:50,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:12:50,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1135766752, now seen corresponding path program 55 times [2022-03-15 22:12:50,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:12:50,870 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673447429] [2022-03-15 22:12:50,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:12:50,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:12:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:12:51,365 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 22:12:51,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:12:51,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673447429] [2022-03-15 22:12:51,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673447429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:12:51,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858102930] [2022-03-15 22:12:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:12:51,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:12:51,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:12:51,367 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:12:51,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-15 22:12:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:12:51,399 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:12:51,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:12:52,273 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:52,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:12:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:53,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:53,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:12:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:12:53,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:12:55,603 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:12:55,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 118 treesize of output 404 [2022-03-15 22:12:55,680 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:55,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 397 treesize of output 433 [2022-03-15 22:13:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:13:20,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858102930] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:20,795 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:20,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 45 [2022-03-15 22:13:20,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1262368112] [2022-03-15 22:13:20,796 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:20,798 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:20,808 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:13:20,809 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:21,191 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [62233#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ start 1))) (not (< start end))) (or (<= (select queue (+ start 1)) (select queue start)) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ 2 start))) (not (< start end))) (or (<= (select queue start) v_old) (not (< start end))))] [2022-03-15 22:13:21,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:13:21,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:21,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:13:21,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1910, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:13:21,192 INFO L87 Difference]: Start difference. First operand 501 states and 1224 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 22:13:21,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:21,619 INFO L93 Difference]: Finished difference Result 1351 states and 3301 transitions. [2022-03-15 22:13:21,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:13:21,620 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 32 [2022-03-15 22:13:21,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:21,622 INFO L225 Difference]: With dead ends: 1351 [2022-03-15 22:13:21,622 INFO L226 Difference]: Without dead ends: 1324 [2022-03-15 22:13:21,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 753 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=383, Invalid=2167, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:13:21,623 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 93 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:21,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 1 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:13:21,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1324 states. [2022-03-15 22:13:21,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1324 to 495. [2022-03-15 22:13:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 2.4493927125506074) internal successors, (1210), 494 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states 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 22:13:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1210 transitions. [2022-03-15 22:13:21,631 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1210 transitions. Word has length 32 [2022-03-15 22:13:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:21,631 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 1210 transitions. [2022-03-15 22:13:21,631 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 22:13:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1210 transitions. [2022-03-15 22:13:21,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:13:21,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:21,632 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:21,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:21,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:21,849 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:21,849 INFO L85 PathProgramCache]: Analyzing trace with hash -311783632, now seen corresponding path program 56 times [2022-03-15 22:13:21,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:21,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119820022] [2022-03-15 22:13:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:21,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:22,397 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 22:13:22,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:22,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119820022] [2022-03-15 22:13:22,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119820022] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:22,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824486647] [2022-03-15 22:13:22,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:13:22,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:22,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:22,398 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:13:22,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-15 22:13:22,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:13:22,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:13:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:13:22,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... Received shutdown request... [2022-03-15 22:13:24,302 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:13:24,314 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 22:13:24,416 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 22:13:24,417 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:13:24,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-03-15 22:13:24,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:24,618 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 1ms.. [2022-03-15 22:13:24,619 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:13:24,620 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:13:24,621 INFO L732 BasicCegarLoop]: Path program histogram: [56, 1, 1] [2022-03-15 22:13:24,622 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:13:24,622 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:13:24,623 INFO L202 PluginConnector]: Adding new model dec-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:13:24 BasicIcfg [2022-03-15 22:13:24,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:13:24,624 INFO L158 Benchmark]: Toolchain (without parser) took 864826.33ms. Allocated memory was 187.7MB in the beginning and 678.4MB in the end (delta: 490.7MB). Free memory was 150.0MB in the beginning and 267.4MB in the end (delta: -117.4MB). Peak memory consumption was 375.3MB. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.10ms. Allocated memory is still 187.7MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.94ms. Allocated memory is still 187.7MB. Free memory was 150.0MB in the beginning and 148.4MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 INFO L158 Benchmark]: Boogie Preprocessor took 9.81ms. Allocated memory is still 187.7MB. Free memory was 148.4MB in the beginning and 147.5MB in the end (delta: 932.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 INFO L158 Benchmark]: RCFGBuilder took 205.44ms. Allocated memory is still 187.7MB. Free memory was 147.5MB in the beginning and 138.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 INFO L158 Benchmark]: TraceAbstraction took 864588.03ms. Allocated memory was 187.7MB in the beginning and 678.4MB in the end (delta: 490.7MB). Free memory was 137.7MB in the beginning and 267.4MB in the end (delta: -129.7MB). Peak memory consumption was 361.6MB. Max. memory is 8.0GB. [2022-03-15 22:13:24,624 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 0.10ms. Allocated memory is still 187.7MB. Free memory is still 151.1MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.94ms. Allocated memory is still 187.7MB. Free memory was 150.0MB in the beginning and 148.4MB in the end (delta: 1.6MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 9.81ms. Allocated memory is still 187.7MB. Free memory was 148.4MB in the beginning and 147.5MB in the end (delta: 932.2kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 205.44ms. Allocated memory is still 187.7MB. Free memory was 147.5MB in the beginning and 138.1MB in the end (delta: 9.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 864588.03ms. Allocated memory was 187.7MB in the beginning and 678.4MB in the end (delta: 490.7MB). Free memory was 137.7MB in the beginning and 267.4MB in the end (delta: -129.7MB). Peak memory consumption was 361.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.4s, 32 PlacesBefore, 20 PlacesAfterwards, 28 TransitionsBefore, 16 TransitionsAfterwards, 124 CoEnabledTransitionPairs, 2 FixpointIterations, 6 TrivialSequentialCompositions, 7 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 2 ConcurrentYvCompositions, 0 ChoiceCompositions, 15 TotalNumberOfCompositions, 144 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 121, positive: 110, positive conditional: 0, positive unconditional: 110, negative: 11, negative conditional: 0, negative unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 74, positive: 66, positive conditional: 0, positive unconditional: 66, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 121, positive: 44, positive conditional: 0, positive unconditional: 44, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 74, unknown conditional: 0, unknown unconditional: 74] , Statistics on independence cache: Total cache size (in pairs): 13, Positive cache size: 9, Positive conditional cache size: 0, Positive unconditional cache size: 9, Negative cache size: 4, Negative conditional cache size: 0, Negative unconditional cache size: 4 - 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: 62]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 1ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 1ms.. - TimeoutResultAtElement [Line: 57]: 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 33 with TraceHistMax 6,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 47 for 1ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 864.5s, OverallIterations: 58, TraceHistogramMax: 6, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.0s, AutomataDifference: 13.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.4s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3484 SdHoareTripleChecker+Valid, 10.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3484 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 8.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6289 mSDsCounter, 1301 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20269 IncrementalHoareTripleChecker+Invalid, 21570 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1301 mSolverCounterUnsat, 1 mSDtfsCounter, 20269 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3846 GetRequests, 1981 SyntacticMatches, 96 SemanticMatches, 1769 ConstructedPredicates, 0 IntricatePredicates, 9 DeprecatedPredicates, 21101 ImplicationChecksByTransitivity, 218.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=515occurred in iteration=52, InterpolantAutomatonStates: 810, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 57 MinimizatonAttempts, 12698 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 822.3s InterpolantComputationTime, 2676 NumberOfCodeBlocks, 2676 NumberOfCodeBlocksAsserted, 244 NumberOfCheckSat, 3820 ConstructedInterpolants, 1136 QuantifiedInterpolants, 113365 SizeOfPredicates, 941 NumberOfNonLiveVariables, 5684 ConjunctsInSsa, 2431 ConjunctsInUnsatCore, 164 InterpolantComputations, 4 PerfectInterpolantSequences, 738/6034 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