/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/inc-subseq.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 22:01:13,366 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 22:01:13,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 22:01:13,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-15 22:01:13,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-15 22:01:13,426 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-15 22:01:13,427 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-15 22:01:13,428 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-15 22:01:13,429 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-15 22:01:13,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-15 22:01:13,430 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-15 22:01:13,431 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-03-15 22:01:13,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 22:01:13,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 22:01:13,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 22:01:13,456 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2022-03-15 22:01:13,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 22:01:13,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 22:01:13,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 22:01:13,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 22:01:13,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 22:01:13,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 22:01:13,477 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 22:01:13,477 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 22:01:13,477 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 22:01:13,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 22:01:13,478 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 22:01:13,479 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 22:01:13,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:01:13,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 22:01:13,480 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 22:01:13,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 22:01:13,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 22:01:13,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 22:01:13,481 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 22:01:13,481 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 22:01:13,481 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 22:01:13,481 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 22:01:13,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 22:01:13,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 22:01:13,685 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 22:01:13,685 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 22:01:13,687 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 22:01:13,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl [2022-03-15 22:01:13,688 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq.wvr.bpl' [2022-03-15 22:01:13,708 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 22:01:13,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 22:01:13,711 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 22:01:13,711 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 22:01:13,711 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 22:01:13,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,730 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,734 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 22:01:13,735 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 22:01:13,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 22:01:13,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 22:01:13,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 22:01:13,744 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,748 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,751 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 22:01:13,755 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 22:01:13,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 22:01:13,755 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 22:01:13,756 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/1) ... [2022-03-15 22:01:13,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:01:13,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:13,785 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-15 22:01:13,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-15 22:01:13,815 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 22:01:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 22:01:13,815 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 22:01:13,815 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 22:01:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 22:01:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 22:01:13,816 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 22:01:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 22:01:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 22:01:13,816 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-15 22:01:13,850 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 22:01:13,852 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 22:01:13,936 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 22:01:13,947 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 22:01:13,947 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 22:01:13,949 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:01:13 BoogieIcfgContainer [2022-03-15 22:01:13,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 22:01:13,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 22:01:13,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 22:01:13,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 22:01:13,952 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:13" (1/2) ... [2022-03-15 22:01:13,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b3ac31d and model type inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 10:01:13, skipping insertion in model container [2022-03-15 22:01:13,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:01:13" (2/2) ... [2022-03-15 22:01:13,954 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq.wvr.bpl [2022-03-15 22:01:13,957 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 22:01:13,957 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 22:01:13,957 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 22:01:13,957 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 22:01:13,977 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 22:01:14,004 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 22:01:14,009 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=MCR, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=true, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-15 22:01:14,009 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 22:01:14,016 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 22:01:14,025 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:14,028 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:14,029 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:14,059 INFO L129 PetriNetUnfolder]: 3/26 cut-off events. [2022-03-15 22:01:14,059 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 22:01:14,064 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 22:01:14,066 INFO L116 LiptonReduction]: Number of co-enabled transitions 124 [2022-03-15 22:01:14,522 INFO L131 LiptonReduction]: Checked pairs total: 144 [2022-03-15 22:01:14,522 INFO L133 LiptonReduction]: Total number of compositions: 15 [2022-03-15 22:01:14,537 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 48 flow [2022-03-15 22:01:14,547 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 22:01:14,549 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 22:01:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 22:01:14,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:14,552 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:14,553 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:14,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -892536048, now seen corresponding path program 1 times [2022-03-15 22:01:14,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:14,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654975722] [2022-03-15 22:01:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:14,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:14,650 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:14,650 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654975722] [2022-03-15 22:01:14,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654975722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:14,651 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:14,651 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 22:01:14,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2006299987] [2022-03-15 22:01:14,652 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:14,654 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:14,661 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 22:01:14,661 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:14,751 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:14,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:01:14,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:14,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:01:14,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:01:14,773 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 22:01:14,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:14,799 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2022-03-15 22:01:14,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:01:14,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-03-15 22:01:14,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:14,809 INFO L225 Difference]: With dead ends: 32 [2022-03-15 22:01:14,810 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 22:01:14,810 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 22:01:14,814 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 22:01:14,816 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 22:01:14,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 22:01:14,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-03-15 22:01:14,841 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 22:01:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 47 transitions. [2022-03-15 22:01:14,843 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 47 transitions. Word has length 8 [2022-03-15 22:01:14,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:14,852 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 47 transitions. [2022-03-15 22:01:14,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:01:14,852 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 47 transitions. [2022-03-15 22:01:14,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 22:01:14,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:14,853 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:14,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 22:01:14,853 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1252850488, now seen corresponding path program 1 times [2022-03-15 22:01:14,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:14,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772959083] [2022-03-15 22:01:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:14,902 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:14,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772959083] [2022-03-15 22:01:14,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772959083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:14,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:14,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 22:01:14,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1552289189] [2022-03-15 22:01:14,904 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:14,904 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:14,906 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 22:01:14,907 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:14,990 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [159#(or (= end start) (< i N)), 158#(< i N)] [2022-03-15 22:01:14,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:14,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:14,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:14,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:01:14,992 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 22:01:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:15,073 INFO L93 Difference]: Finished difference Result 32 states and 62 transitions. [2022-03-15 22:01:15,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:15,073 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 22:01:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:15,074 INFO L225 Difference]: With dead ends: 32 [2022-03-15 22:01:15,074 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 22:01:15,075 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 22:01:15,076 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:15,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:15,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 22:01:15,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-15 22:01:15,082 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 22:01:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2022-03-15 22:01:15,083 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 10 [2022-03-15 22:01:15,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2022-03-15 22:01:15,083 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 22:01:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2022-03-15 22:01:15,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:01:15,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:15,084 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:15,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 22:01:15,084 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:15,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:15,084 INFO L85 PathProgramCache]: Analyzing trace with hash -745074643, now seen corresponding path program 1 times [2022-03-15 22:01:15,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:15,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039806993] [2022-03-15 22:01:15,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:15,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:15,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:15,179 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:15,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039806993] [2022-03-15 22:01:15,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039806993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:15,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214388605] [2022-03-15 22:01:15,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:15,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:15,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:15,184 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:15,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-15 22:01:15,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:15,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:01:15,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:15,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-15 22:01:15,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 22:01:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:15,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:15,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:15,474 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 15 treesize of output 19 [2022-03-15 22:01:15,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-15 22:01:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:01:15,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214388605] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:15,540 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:15,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-15 22:01:15,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1319219063] [2022-03-15 22:01:15,540 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:15,541 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:15,543 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2022-03-15 22:01:15,543 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:15,639 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [319#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:15,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:15,640 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:15,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:01:15,640 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 22:01:15,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:15,725 INFO L93 Difference]: Finished difference Result 59 states and 117 transitions. [2022-03-15 22:01:15,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:01:15,725 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 22:01:15,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:15,726 INFO L225 Difference]: With dead ends: 59 [2022-03-15 22:01:15,726 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 22:01:15,726 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 22:01:15,727 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:15,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:15,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 22:01:15,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-03-15 22:01:15,746 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 22:01:15,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 79 transitions. [2022-03-15 22:01:15,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 79 transitions. Word has length 12 [2022-03-15 22:01:15,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:15,747 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 79 transitions. [2022-03-15 22:01:15,747 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 22:01:15,747 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 79 transitions. [2022-03-15 22:01:15,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:01:15,748 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:15,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:15,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:15,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:15,980 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:15,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:15,980 INFO L85 PathProgramCache]: Analyzing trace with hash 253259973, now seen corresponding path program 2 times [2022-03-15 22:01:15,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:15,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540532408] [2022-03-15 22:01:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:15,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:16,023 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 22:01:16,024 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:16,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540532408] [2022-03-15 22:01:16,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540532408] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:16,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:16,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 22:01:16,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1557198381] [2022-03-15 22:01:16,025 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:16,026 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:16,028 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 22:01:16,028 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:16,056 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:16,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 22:01:16,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:16,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 22:01:16,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 22:01:16,057 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 22:01:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:16,097 INFO L93 Difference]: Finished difference Result 77 states and 154 transitions. [2022-03-15 22:01:16,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 22:01:16,098 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 22:01:16,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:16,099 INFO L225 Difference]: With dead ends: 77 [2022-03-15 22:01:16,099 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 22:01:16,099 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 22:01:16,099 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 22:01:16,100 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 22:01:16,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 22:01:16,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-03-15 22:01:16,104 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 22:01:16,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 117 transitions. [2022-03-15 22:01:16,105 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 117 transitions. Word has length 14 [2022-03-15 22:01:16,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:16,105 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 117 transitions. [2022-03-15 22:01:16,105 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 22:01:16,105 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 117 transitions. [2022-03-15 22:01:16,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:01:16,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:16,106 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:16,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 22:01:16,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:16,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1911032220, now seen corresponding path program 3 times [2022-03-15 22:01:16,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:16,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71835861] [2022-03-15 22:01:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:16,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:16,138 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 22:01:16,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71835861] [2022-03-15 22:01:16,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71835861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:16,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19311321] [2022-03-15 22:01:16,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:16,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:16,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:16,144 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:16,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-15 22:01:16,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:01:16,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 22:01:16,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:16,198 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 22:01:16,198 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 22:01:16,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19311321] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:16,198 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 22:01:16,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-15 22:01:16,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [101842789] [2022-03-15 22:01:16,198 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:16,199 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:16,201 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 22:01:16,201 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:16,255 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [686#(or (<= end start) (<= (+ 2 start) end))] [2022-03-15 22:01:16,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:16,256 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:16,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:16,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:01:16,257 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 22:01:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:16,315 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 22:01:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:16,316 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 22:01:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:16,319 INFO L225 Difference]: With dead ends: 79 [2022-03-15 22:01:16,319 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 22:01:16,319 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 22:01:16,320 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 22:01:16,321 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 22:01:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 22:01:16,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-03-15 22:01:16,333 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 22:01:16,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 129 transitions. [2022-03-15 22:01:16,334 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 129 transitions. Word has length 14 [2022-03-15 22:01:16,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:16,334 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 129 transitions. [2022-03-15 22:01:16,334 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 22:01:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 129 transitions. [2022-03-15 22:01:16,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:16,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:16,335 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:16,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:16,543 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 22:01:16,543 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:16,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:16,544 INFO L85 PathProgramCache]: Analyzing trace with hash -289173252, now seen corresponding path program 4 times [2022-03-15 22:01:16,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:16,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094059935] [2022-03-15 22:01:16,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:16,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:16,655 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 22:01:16,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:16,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094059935] [2022-03-15 22:01:16,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094059935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:16,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322755753] [2022-03-15 22:01:16,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:16,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:16,657 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:16,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-15 22:01:16,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:16,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:16,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:01:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:16,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:16,834 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 22:01:16,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:16,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:16,888 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 22:01:16,900 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 22:01:16,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:17,086 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:17,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 22:01:17,094 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:17,095 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 41 treesize of output 37 [2022-03-15 22:01:17,326 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 22:01:17,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322755753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:17,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:17,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 22:01:17,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [794915027] [2022-03-15 22:01:17,328 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:17,330 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:17,332 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:01:17,332 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:17,417 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [989#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:17,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:01:17,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:17,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:01:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 22:01:17,418 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 22:01:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:17,513 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2022-03-15 22:01:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:01:17,513 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 22:01:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:17,514 INFO L225 Difference]: With dead ends: 112 [2022-03-15 22:01:17,514 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 22:01:17,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2022-03-15 22:01:17,515 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 22:01:17,515 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 22:01:17,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 22:01:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-03-15 22:01:17,518 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 22:01:17,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 132 transitions. [2022-03-15 22:01:17,519 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 132 transitions. Word has length 16 [2022-03-15 22:01:17,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:17,519 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 132 transitions. [2022-03-15 22:01:17,519 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 22:01:17,519 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 132 transitions. [2022-03-15 22:01:17,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:17,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:17,519 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:17,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:17,742 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 22:01:17,742 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:17,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1827578112, now seen corresponding path program 5 times [2022-03-15 22:01:17,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:17,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965597998] [2022-03-15 22:01:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:17,857 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 22:01:17,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:17,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965597998] [2022-03-15 22:01:17,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965597998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:17,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727358283] [2022-03-15 22:01:17,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:17,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:17,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:17,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:17,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-15 22:01:17,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:01:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:17,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 22:01:17,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:18,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2022-03-15 22:01:18,088 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:18,088 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 22:01:18,099 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 22:01:18,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:18,246 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:18,246 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 36 treesize of output 22 [2022-03-15 22:01:18,271 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:18,272 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 32 treesize of output 52 [2022-03-15 22:01:18,374 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 22:01:18,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727358283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:18,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:18,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 22:01:18,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [635208840] [2022-03-15 22:01:18,375 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:18,377 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:18,380 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 22:01:18,380 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:18,484 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1336#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start)))), 1335#(and ok (<= v_old (select A i)) (= end start))] [2022-03-15 22:01:18,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:01:18,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:18,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:01:18,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:01:18,486 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 22:01:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:18,591 INFO L93 Difference]: Finished difference Result 112 states and 222 transitions. [2022-03-15 22:01:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:18,591 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 22:01:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:18,592 INFO L225 Difference]: With dead ends: 112 [2022-03-15 22:01:18,592 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 22:01:18,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2022-03-15 22:01:18,593 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 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 22:01:18,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 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 22:01:18,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 22:01:18,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-03-15 22:01:18,598 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 22:01:18,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 98 transitions. [2022-03-15 22:01:18,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 98 transitions. Word has length 16 [2022-03-15 22:01:18,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:18,598 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 98 transitions. [2022-03-15 22:01:18,598 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 22:01:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 98 transitions. [2022-03-15 22:01:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:18,599 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:18,599 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:18,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:18,815 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 22:01:18,815 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:18,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:18,815 INFO L85 PathProgramCache]: Analyzing trace with hash 754492732, now seen corresponding path program 6 times [2022-03-15 22:01:18,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:18,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084552501] [2022-03-15 22:01:18,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:18,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:18,913 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 22:01:18,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:18,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084552501] [2022-03-15 22:01:18,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084552501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:18,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441439429] [2022-03-15 22:01:18,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:18,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:18,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:18,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:18,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:01:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:01:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:18,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-15 22:01:19,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:19,054 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 22:01:19,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:19,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:19,146 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 22:01:19,158 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 22:01:19,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:19,345 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:19,345 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 22:01:19,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:19,354 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 22:01:19,500 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 22:01:19,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441439429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:19,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:19,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 22:01:19,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [147372714] [2022-03-15 22:01:19,501 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:19,502 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:19,507 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:01:19,507 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:19,600 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1651#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:19,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:01:19,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:19,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:01:19,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-15 22:01:19,601 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 22:01:19,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:19,689 INFO L93 Difference]: Finished difference Result 113 states and 240 transitions. [2022-03-15 22:01:19,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:19,689 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 22:01:19,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:19,690 INFO L225 Difference]: With dead ends: 113 [2022-03-15 22:01:19,690 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 22:01:19,690 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 22:01:19,691 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 30 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:19,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 1 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:19,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 22:01:19,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-03-15 22:01:19,693 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 22:01:19,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 132 transitions. [2022-03-15 22:01:19,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 132 transitions. Word has length 16 [2022-03-15 22:01:19,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:19,694 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 132 transitions. [2022-03-15 22:01:19,694 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 22:01:19,694 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 132 transitions. [2022-03-15 22:01:19,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:19,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:19,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:19,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:19,907 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 22:01:19,908 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1753297468, now seen corresponding path program 7 times [2022-03-15 22:01:19,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:19,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067648254] [2022-03-15 22:01:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:19,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:20,023 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 22:01:20,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:20,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067648254] [2022-03-15 22:01:20,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067648254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:20,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470532558] [2022-03-15 22:01:20,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:20,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:20,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:20,028 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:20,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-15 22:01:20,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:20,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:01:20,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:20,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:20,134 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 22:01:20,230 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:20,230 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 22:01:20,239 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 22:01:20,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:20,411 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:20,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 56 [2022-03-15 22:01:20,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:20,426 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 41 treesize of output 37 [2022-03-15 22:01:20,564 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 22:01:20,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470532558] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:20,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:20,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 22:01:20,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1621621296] [2022-03-15 22:01:20,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:20,565 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:20,568 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 22:01:20,568 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:20,721 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1989#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:20,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:01:20,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:01:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:01:20,721 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 22:01:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:20,834 INFO L93 Difference]: Finished difference Result 127 states and 275 transitions. [2022-03-15 22:01:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:20,835 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 22:01:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:20,836 INFO L225 Difference]: With dead ends: 127 [2022-03-15 22:01:20,836 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 22:01:20,836 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 22:01:20,837 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:20,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 22:01:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2022-03-15 22:01:20,840 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 22:01:20,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 144 transitions. [2022-03-15 22:01:20,840 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 144 transitions. Word has length 16 [2022-03-15 22:01:20,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:20,840 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 144 transitions. [2022-03-15 22:01:20,841 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 22:01:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 144 transitions. [2022-03-15 22:01:20,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:01:20,841 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:20,841 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:20,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:21,059 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 22:01:21,059 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:21,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:21,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1771504108, now seen corresponding path program 8 times [2022-03-15 22:01:21,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:21,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268263303] [2022-03-15 22:01:21,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:21,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:21,089 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 22:01:21,090 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:21,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268263303] [2022-03-15 22:01:21,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268263303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:21,090 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109860451] [2022-03-15 22:01:21,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:21,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:21,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:21,091 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:21,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-15 22:01:21,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:21,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:21,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 22:01:21,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:21,136 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 22:01:21,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:21,160 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 22:01:21,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109860451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:21,161 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:21,161 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 22:01:21,163 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350502658] [2022-03-15 22:01:21,163 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:21,164 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:21,167 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:01:21,167 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:21,192 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:21,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:21,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:21,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:01:21,192 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 22:01:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:21,236 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2022-03-15 22:01:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:21,237 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 22:01:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:21,238 INFO L225 Difference]: With dead ends: 133 [2022-03-15 22:01:21,238 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 22:01:21,238 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 22:01:21,238 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 37 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:21,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:01:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 22:01:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-03-15 22:01:21,241 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 22:01:21,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 223 transitions. [2022-03-15 22:01:21,242 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 223 transitions. Word has length 18 [2022-03-15 22:01:21,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:21,242 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 223 transitions. [2022-03-15 22:01:21,242 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 22:01:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 223 transitions. [2022-03-15 22:01:21,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:21,243 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:21,243 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:21,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:21,443 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 22:01:21,444 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:21,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:21,444 INFO L85 PathProgramCache]: Analyzing trace with hash -381016437, now seen corresponding path program 9 times [2022-03-15 22:01:21,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:21,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755241383] [2022-03-15 22:01:21,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:21,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:21,585 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 22:01:21,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:21,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755241383] [2022-03-15 22:01:21,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755241383] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:21,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154933614] [2022-03-15 22:01:21,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:21,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:21,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:21,587 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:21,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-15 22:01:21,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:01:21,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:21,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:01:21,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:21,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:21,861 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 22:01:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:22,072 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:22,073 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 22:01:22,374 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 22:01:22,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:23,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:23,972 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-03-15 22:01:23,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 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 22:01:23,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:23,991 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 22:01:24,782 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 22:01:24,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154933614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:24,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:24,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-15 22:01:24,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1954883167] [2022-03-15 22:01:24,783 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:24,784 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:24,802 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:24,803 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:24,896 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2823#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:24,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:24,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:24,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:24,897 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 22:01:25,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:25,039 INFO L93 Difference]: Finished difference Result 161 states and 352 transitions. [2022-03-15 22:01:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:01:25,040 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 22:01:25,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:25,041 INFO L225 Difference]: With dead ends: 161 [2022-03-15 22:01:25,041 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 22:01:25,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=587, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:01:25,041 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 34 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:25,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:25,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 22:01:25,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2022-03-15 22:01:25,045 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 22:01:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-03-15 22:01:25,045 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 20 [2022-03-15 22:01:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:25,045 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-03-15 22:01:25,045 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 22:01:25,046 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-03-15 22:01:25,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:25,046 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:25,046 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:25,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:25,247 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 22:01:25,247 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:25,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1406160659, now seen corresponding path program 10 times [2022-03-15 22:01:25,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:25,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860949570] [2022-03-15 22:01:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:25,425 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 22:01:25,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:25,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860949570] [2022-03-15 22:01:25,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860949570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:25,425 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884931359] [2022-03-15 22:01:25,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:25,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:25,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:25,426 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:25,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-15 22:01:25,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:25,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:25,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:25,646 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 22:01:25,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:25,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:25,823 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 22:01:25,830 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 22:01:25,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:26,269 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:26,270 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 22:01:26,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:26,285 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 22:01:27,038 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 22:01:27,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884931359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:27,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:27,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 22:01:27,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1089253103] [2022-03-15 22:01:27,039 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:27,040 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:27,044 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:27,044 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:27,176 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3325#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:27,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:27,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:27,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:01:27,177 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 22:01:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:27,306 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2022-03-15 22:01:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:27,306 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 22:01:27,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:27,307 INFO L225 Difference]: With dead ends: 201 [2022-03-15 22:01:27,307 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 22:01:27,307 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 22:01:27,307 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 55 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:27,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 1 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 22:01:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 94. [2022-03-15 22:01:27,310 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 22:01:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 213 transitions. [2022-03-15 22:01:27,310 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 213 transitions. Word has length 20 [2022-03-15 22:01:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:27,310 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 213 transitions. [2022-03-15 22:01:27,311 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 22:01:27,311 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 213 transitions. [2022-03-15 22:01:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:27,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:27,311 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:27,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:27,518 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 22:01:27,518 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -467270005, now seen corresponding path program 11 times [2022-03-15 22:01:27,519 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:27,519 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367447792] [2022-03-15 22:01:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:27,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:27,652 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 22:01:27,653 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:27,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367447792] [2022-03-15 22:01:27,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367447792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:27,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382080010] [2022-03-15 22:01:27,653 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:27,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:27,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:27,654 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:27,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-15 22:01:27,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:01:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:27,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:01:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:27,948 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:27,948 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 22:01:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:28,008 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 22:01:28,025 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 22:01:28,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:28,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:28,437 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 49 treesize of output 57 [2022-03-15 22:01:28,505 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:28,506 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 94 treesize of output 134 [2022-03-15 22:01:28,943 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 22:01:28,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382080010] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:28,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:28,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 22:01:28,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1338299429] [2022-03-15 22:01:28,943 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:28,945 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:28,948 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:28,948 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:29,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3856#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:29,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:29,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:29,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:29,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:01:29,028 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 22:01:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:29,140 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2022-03-15 22:01:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:29,140 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 22:01:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:29,140 INFO L225 Difference]: With dead ends: 165 [2022-03-15 22:01:29,140 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 22:01:29,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:29,141 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:29,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 22:01:29,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 101. [2022-03-15 22:01:29,143 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 22:01:29,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 229 transitions. [2022-03-15 22:01:29,144 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 229 transitions. Word has length 20 [2022-03-15 22:01:29,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:29,144 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 229 transitions. [2022-03-15 22:01:29,144 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 22:01:29,144 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 229 transitions. [2022-03-15 22:01:29,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:29,144 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:29,145 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:29,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:29,359 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 22:01:29,359 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:29,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:29,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1931394221, now seen corresponding path program 12 times [2022-03-15 22:01:29,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:29,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922925058] [2022-03-15 22:01:29,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:29,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:29,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:29,490 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 22:01:29,490 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:29,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922925058] [2022-03-15 22:01:29,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922925058] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:29,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042014266] [2022-03-15 22:01:29,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:29,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:29,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:29,493 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:29,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-15 22:01:29,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:01:29,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:29,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:01:29,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:29,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:29,769 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 22:01:29,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:29,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:29,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:29,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:29,931 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:29,932 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 22:01:30,033 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 22:01:30,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:30,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:30,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:30,707 INFO L353 Elim1Store]: treesize reduction 14, result has 79.7 percent of original size [2022-03-15 22:01:30,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 54 treesize of output 84 [2022-03-15 22:01:30,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:30,721 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 22:01:31,573 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 22:01:31,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042014266] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:31,573 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:31,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-03-15 22:01:31,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [980081137] [2022-03-15 22:01:31,573 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:31,575 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:31,578 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:31,578 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:31,726 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4369#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:31,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:31,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:31,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:01:31,727 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 22:01:31,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:31,853 INFO L93 Difference]: Finished difference Result 262 states and 593 transitions. [2022-03-15 22:01:31,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:31,854 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 22:01:31,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:31,856 INFO L225 Difference]: With dead ends: 262 [2022-03-15 22:01:31,856 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 22:01:31,856 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 22:01:31,857 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 51 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:31,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 1 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:31,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 22:01:31,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2022-03-15 22:01:31,861 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 22:01:31,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 253 transitions. [2022-03-15 22:01:31,862 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 253 transitions. Word has length 20 [2022-03-15 22:01:31,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:31,862 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 253 transitions. [2022-03-15 22:01:31,862 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 22:01:31,862 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 253 transitions. [2022-03-15 22:01:31,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:31,863 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:31,863 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:31,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:32,075 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 22:01:32,075 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:32,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1040041521, now seen corresponding path program 13 times [2022-03-15 22:01:32,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:32,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996994253] [2022-03-15 22:01:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:32,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:32,205 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 22:01:32,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:32,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996994253] [2022-03-15 22:01:32,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996994253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:32,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204572735] [2022-03-15 22:01:32,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:32,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:32,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:32,206 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:32,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-15 22:01:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:32,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:32,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:32,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:32,455 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 22:01:32,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:32,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:32,593 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 22:01:32,604 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 22:01:32,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:32,991 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:32,991 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 22:01:33,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:33,005 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 22:01:33,416 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 22:01:33,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204572735] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:33,416 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:33,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 22:01:33,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [265509274] [2022-03-15 22:01:33,416 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:33,418 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:33,421 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:01:33,421 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:33,544 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [4995#(and (<= (+ start 1) end) (<= end (+ start 1)) (<= (select queue start) (select A i)) ok (<= v_old (select queue start))), 4994#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:33,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:33,544 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:33,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:33,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:33,545 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 22:01:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:33,678 INFO L93 Difference]: Finished difference Result 237 states and 529 transitions. [2022-03-15 22:01:33,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:33,678 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 22:01:33,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:33,679 INFO L225 Difference]: With dead ends: 237 [2022-03-15 22:01:33,679 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 22:01:33,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2022-03-15 22:01:33,680 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:33,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:33,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 22:01:33,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2022-03-15 22:01:33,683 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 22:01:33,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 281 transitions. [2022-03-15 22:01:33,683 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 281 transitions. Word has length 20 [2022-03-15 22:01:33,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:33,683 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 281 transitions. [2022-03-15 22:01:33,683 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 22:01:33,683 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 281 transitions. [2022-03-15 22:01:33,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:33,684 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:33,684 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:33,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:33,895 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 22:01:33,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1305244897, now seen corresponding path program 14 times [2022-03-15 22:01:33,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:33,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199190206] [2022-03-15 22:01:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:33,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:34,041 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 22:01:34,041 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:34,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199190206] [2022-03-15 22:01:34,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199190206] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:34,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071985458] [2022-03-15 22:01:34,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:34,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:34,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:34,042 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:34,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-15 22:01:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:34,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:34,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:34,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:34,394 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 22:01:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:34,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:34,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:34,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:34,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:34,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:34,465 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 22:01:34,476 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 22:01:34,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:34,880 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:34,880 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 22:01:34,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:34,895 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 22:01:35,726 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 22:01:35,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071985458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:35,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:35,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 22:01:35,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1414265838] [2022-03-15 22:01:35,727 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:35,728 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:35,731 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:01:35,731 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:35,847 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [5616#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start)))), 5617#(and (<= (+ start 1) end) (<= end (+ start 1)) (<= (select queue start) (select A i)) ok (<= v_old (select queue start)))] [2022-03-15 22:01:35,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:35,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:35,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:01:35,848 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 22:01:36,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:36,026 INFO L93 Difference]: Finished difference Result 284 states and 626 transitions. [2022-03-15 22:01:36,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:36,027 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 22:01:36,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:36,028 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:01:36,028 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 22:01:36,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:36,028 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 47 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:36,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 1 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 22:01:36,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-15 22:01:36,031 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 22:01:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 324 transitions. [2022-03-15 22:01:36,032 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 324 transitions. Word has length 20 [2022-03-15 22:01:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:36,032 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 324 transitions. [2022-03-15 22:01:36,032 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 22:01:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 324 transitions. [2022-03-15 22:01:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:36,032 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:36,033 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:36,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:36,235 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 22:01:36,235 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:36,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:36,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1482940661, now seen corresponding path program 15 times [2022-03-15 22:01:36,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:36,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202634986] [2022-03-15 22:01:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:36,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:36,388 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 22:01:36,388 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:36,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202634986] [2022-03-15 22:01:36,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202634986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:36,388 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324138886] [2022-03-15 22:01:36,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:36,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:36,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:36,390 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:36,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-15 22:01:36,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:01:36,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:36,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:01:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:36,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:36,583 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 22:01:36,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:36,784 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 44 treesize of output 68 [2022-03-15 22:01:37,039 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 22:01:37,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:37,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:37,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:37,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:37,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:37,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:37,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:37,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:37,647 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:37,647 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 22:01:37,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:37,664 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 62 treesize of output 66 [2022-03-15 22:01:37,888 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 22:01:37,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324138886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:37,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:37,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-03-15 22:01:37,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [918642945] [2022-03-15 22:01:37,888 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:37,890 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:37,893 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:37,893 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:37,979 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6326#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:37,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:37,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:37,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:37,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2022-03-15 22:01:37,981 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 22:01:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:38,124 INFO L93 Difference]: Finished difference Result 306 states and 711 transitions. [2022-03-15 22:01:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:38,125 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 22:01:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:38,126 INFO L225 Difference]: With dead ends: 306 [2022-03-15 22:01:38,126 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 22:01:38,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:01:38,127 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 48 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:38,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 22:01:38,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 161. [2022-03-15 22:01:38,130 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 22:01:38,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 376 transitions. [2022-03-15 22:01:38,131 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 376 transitions. Word has length 20 [2022-03-15 22:01:38,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:38,131 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 376 transitions. [2022-03-15 22:01:38,131 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 22:01:38,131 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 376 transitions. [2022-03-15 22:01:38,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:38,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:38,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:38,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:38,347 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 22:01:38,347 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:38,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:38,348 INFO L85 PathProgramCache]: Analyzing trace with hash 304236435, now seen corresponding path program 16 times [2022-03-15 22:01:38,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:38,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452077100] [2022-03-15 22:01:38,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:38,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:38,500 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 22:01:38,500 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:38,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452077100] [2022-03-15 22:01:38,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452077100] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:38,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645363396] [2022-03-15 22:01:38,500 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:38,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:38,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:38,501 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:38,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-15 22:01:38,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:38,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:38,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:38,702 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 22:01:38,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,893 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:38,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,895 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:38,895 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 22:01:38,901 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 22:01:38,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:39,287 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:39,288 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 22:01:39,303 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:39,303 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 22:01:40,140 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 22:01:40,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645363396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:40,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:40,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 22:01:40,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1034834283] [2022-03-15 22:01:40,141 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:40,142 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:40,146 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:40,146 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:40,275 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7095#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:40,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:40,276 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:40,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:40,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:01:40,276 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 22:01:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:40,425 INFO L93 Difference]: Finished difference Result 317 states and 734 transitions. [2022-03-15 22:01:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:01:40,426 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 22:01:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:40,427 INFO L225 Difference]: With dead ends: 317 [2022-03-15 22:01:40,427 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 22:01:40,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:40,428 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 22:01:40,428 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 22:01:40,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 22:01:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 159. [2022-03-15 22:01:40,431 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 22:01:40,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 374 transitions. [2022-03-15 22:01:40,432 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 374 transitions. Word has length 20 [2022-03-15 22:01:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 374 transitions. [2022-03-15 22:01:40,432 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 22:01:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 374 transitions. [2022-03-15 22:01:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:40,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:40,432 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:40,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:40,646 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 22:01:40,646 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1016589853, now seen corresponding path program 17 times [2022-03-15 22:01:40,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:40,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658248838] [2022-03-15 22:01:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:40,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:40,806 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 22:01:40,807 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:40,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658248838] [2022-03-15 22:01:40,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658248838] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:40,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807128776] [2022-03-15 22:01:40,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:40,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:40,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:40,808 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-15 22:01:40,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:01:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:01:40,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:41,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:41,011 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 22:01:41,142 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 22:01:41,142 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 33 treesize of output 13 [2022-03-15 22:01:41,148 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 22:01:41,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:41,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:41,455 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 49 treesize of output 57 [2022-03-15 22:01:41,522 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:41,522 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 94 treesize of output 134 [2022-03-15 22:01:41,910 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 22:01:41,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807128776] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:41,911 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:41,911 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 22:01:41,911 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1960902458] [2022-03-15 22:01:41,911 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:41,912 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:41,916 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 22:01:41,916 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:42,196 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7869#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:42,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:42,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:42,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:42,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:01:42,197 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 22:01:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:42,348 INFO L93 Difference]: Finished difference Result 327 states and 758 transitions. [2022-03-15 22:01:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:01:42,348 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 22:01:42,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:42,349 INFO L225 Difference]: With dead ends: 327 [2022-03-15 22:01:42,349 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 22:01:42,349 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 22:01:42,350 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 22:01:42,350 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 22:01:42,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 22:01:42,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 164. [2022-03-15 22:01:42,353 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 22:01:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 386 transitions. [2022-03-15 22:01:42,353 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 386 transitions. Word has length 20 [2022-03-15 22:01:42,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:42,354 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 386 transitions. [2022-03-15 22:01:42,354 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 22:01:42,354 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 386 transitions. [2022-03-15 22:01:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 22:01:42,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:42,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:42,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:42,569 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 22:01:42,570 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:42,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:42,570 INFO L85 PathProgramCache]: Analyzing trace with hash -166379485, now seen corresponding path program 18 times [2022-03-15 22:01:42,571 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:42,571 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431393692] [2022-03-15 22:01:42,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:42,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:42,599 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 22:01:42,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:42,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431393692] [2022-03-15 22:01:42,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431393692] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:42,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117645712] [2022-03-15 22:01:42,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:42,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:42,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:42,600 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:42,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-15 22:01:42,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:01:42,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:42,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 22:01:42,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:42,656 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 22:01:42,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:42,687 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 22:01:42,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117645712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:42,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:42,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 22:01:42,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1633558535] [2022-03-15 22:01:42,688 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:42,689 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:42,693 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 34 transitions. [2022-03-15 22:01:42,693 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:42,715 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:42,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:01:42,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:42,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:01:42,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:01:42,716 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 22:01:42,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:42,759 INFO L93 Difference]: Finished difference Result 283 states and 632 transitions. [2022-03-15 22:01:42,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:01:42,760 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 22:01:42,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:42,761 INFO L225 Difference]: With dead ends: 283 [2022-03-15 22:01:42,761 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 22:01:42,761 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 22:01:42,761 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 22:01:42,761 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 22:01:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 22:01:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 214. [2022-03-15 22:01:42,764 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 22:01:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2022-03-15 22:01:42,765 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 22 [2022-03-15 22:01:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:42,765 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2022-03-15 22:01:42,765 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 22:01:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2022-03-15 22:01:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:42,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:42,766 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:42,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:42,979 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 22:01:42,979 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash -689732318, now seen corresponding path program 19 times [2022-03-15 22:01:42,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:42,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994733817] [2022-03-15 22:01:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:43,150 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 22:01:43,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:43,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994733817] [2022-03-15 22:01:43,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994733817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:43,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644640229] [2022-03-15 22:01:43,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:43,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:43,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:43,152 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:43,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-15 22:01:43,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:43,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:43,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:43,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:43,604 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 22:01:43,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:43,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:43,815 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 22:01:43,821 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 22:01:43,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:44,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:44,458 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 22:01:44,596 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:01:44,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 22:01:46,210 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 22:01:46,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644640229] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:46,210 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:46,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 22:01:46,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1809023399] [2022-03-15 22:01:46,211 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:46,213 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:46,223 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:01:46,223 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:46,346 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9538#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:01:46,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:46,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:46,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:46,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:01:46,347 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 22:01:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:46,490 INFO L93 Difference]: Finished difference Result 523 states and 1246 transitions. [2022-03-15 22:01:46,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:46,490 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 22:01:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:46,492 INFO L225 Difference]: With dead ends: 523 [2022-03-15 22:01:46,492 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 22:01:46,492 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 22:01:46,492 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 22:01:46,492 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 22:01:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 22:01:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 192. [2022-03-15 22:01:46,497 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 22:01:46,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 460 transitions. [2022-03-15 22:01:46,497 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 460 transitions. Word has length 24 [2022-03-15 22:01:46,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:46,498 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 460 transitions. [2022-03-15 22:01:46,498 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 22:01:46,498 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 460 transitions. [2022-03-15 22:01:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:46,499 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:46,499 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:46,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:46,703 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 22:01:46,703 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash 201620382, now seen corresponding path program 20 times [2022-03-15 22:01:46,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:46,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951199565] [2022-03-15 22:01:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:46,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:46,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:46,930 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 22:01:46,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:46,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951199565] [2022-03-15 22:01:46,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951199565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:46,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146597647] [2022-03-15 22:01:46,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:46,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:46,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:46,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:46,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-15 22:01:46,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:46,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:47,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:47,372 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 22:01:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:47,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:47,558 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 22:01:47,568 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 22:01:47,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:48,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:48,266 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 22:01:48,420 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:01:48,420 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 22:01:50,297 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 22:01:50,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146597647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:50,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:50,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-15 22:01:50,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1314836957] [2022-03-15 22:01:50,298 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:50,300 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:50,304 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:01:50,304 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:50,440 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10619#(and (<= (+ start 1) end) (<= end (+ start 1)) (<= (select queue start) (select A i)) ok (<= v_old (select queue start))), 10620#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:50,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:01:50,441 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:50,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:01:50,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:01:50,441 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 22:01:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:50,659 INFO L93 Difference]: Finished difference Result 301 states and 675 transitions. [2022-03-15 22:01:50,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:01:50,659 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 22:01:50,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:50,660 INFO L225 Difference]: With dead ends: 301 [2022-03-15 22:01:50,660 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 22:01:50,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:01:50,661 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 22:01:50,661 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 22:01:50,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 22:01:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2022-03-15 22:01:50,664 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 22:01:50,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 432 transitions. [2022-03-15 22:01:50,664 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 432 transitions. Word has length 24 [2022-03-15 22:01:50,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:50,664 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 432 transitions. [2022-03-15 22:01:50,664 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 22:01:50,664 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 432 transitions. [2022-03-15 22:01:50,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:50,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:50,665 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:50,682 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 22:01:50,875 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 22:01:50,875 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:50,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:50,875 INFO L85 PathProgramCache]: Analyzing trace with hash -241278758, now seen corresponding path program 21 times [2022-03-15 22:01:50,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:50,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900599855] [2022-03-15 22:01:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:51,070 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 22:01:51,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:51,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900599855] [2022-03-15 22:01:51,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900599855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:51,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885373053] [2022-03-15 22:01:51,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:51,079 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:51,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-15 22:01:51,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 22:01:51,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:51,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:01:51,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:51,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:51,483 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 22:01:51,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:51,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:51,974 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 22:01:53,769 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 22:01:53,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:56,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:56,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:56,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:56,399 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 22:01:56,400 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 22:01:56,432 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:56,432 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 22:01:58,652 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 22:01:58,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885373053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:58,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:58,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-15 22:01:58,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1972551197] [2022-03-15 22:01:58,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:58,655 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:58,659 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:01:58,659 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:58,760 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11462#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:01:58,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:01:58,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:58,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:01:58,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:01:58,761 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 22:01:58,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:58,970 INFO L93 Difference]: Finished difference Result 310 states and 723 transitions. [2022-03-15 22:01:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:01:58,971 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 22:01:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:58,987 INFO L225 Difference]: With dead ends: 310 [2022-03-15 22:01:58,988 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 22:01:58,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:01:58,990 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:58,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 1 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:01:58,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 22:01:58,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 192. [2022-03-15 22:01:58,994 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 22:01:58,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 454 transitions. [2022-03-15 22:01:58,994 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 454 transitions. Word has length 24 [2022-03-15 22:01:58,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:58,994 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 454 transitions. [2022-03-15 22:01:58,994 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 22:01:58,994 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 454 transitions. [2022-03-15 22:01:58,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:58,995 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:58,995 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:59,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-15 22:01:59,211 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 22:01:59,211 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:59,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:59,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1545898338, now seen corresponding path program 22 times [2022-03-15 22:01:59,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:59,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404753065] [2022-03-15 22:01:59,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:59,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:59,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:59,449 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 22:01:59,450 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:59,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404753065] [2022-03-15 22:01:59,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404753065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:59,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417326103] [2022-03-15 22:01:59,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:59,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:59,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:59,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:01:59,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 22:01:59,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:59,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:59,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:59,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:59,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:59,829 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 22:02:00,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:00,170 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 22:02:00,177 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 22:02:00,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:00,981 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:00,982 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 22:02:01,011 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:01,012 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 22:02:04,706 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 22:02:04,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417326103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:04,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:04,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 22:02:04,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1250205206] [2022-03-15 22:02:04,707 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:04,709 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:04,714 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:02:04,714 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:04,858 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12330#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:04,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:04,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:04,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:04,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:02:04,859 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 22:02:05,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:05,031 INFO L93 Difference]: Finished difference Result 368 states and 855 transitions. [2022-03-15 22:02:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:05,031 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 22:02:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:05,033 INFO L225 Difference]: With dead ends: 368 [2022-03-15 22:02:05,033 INFO L226 Difference]: Without dead ends: 349 [2022-03-15 22:02:05,033 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 22:02:05,033 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 22:02:05,033 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 22:02:05,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-15 22:02:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 166. [2022-03-15 22:02:05,037 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 22:02:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 394 transitions. [2022-03-15 22:02:05,037 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 394 transitions. Word has length 24 [2022-03-15 22:02:05,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:05,037 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 394 transitions. [2022-03-15 22:02:05,037 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 22:02:05,037 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 394 transitions. [2022-03-15 22:02:05,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:05,038 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:05,039 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:05,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:05,247 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 22:02:05,247 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:05,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:05,248 INFO L85 PathProgramCache]: Analyzing trace with hash 225072050, now seen corresponding path program 23 times [2022-03-15 22:02:05,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:05,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470307391] [2022-03-15 22:02:05,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:05,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:05,471 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 22:02:05,471 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:05,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470307391] [2022-03-15 22:02:05,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470307391] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:05,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706724824] [2022-03-15 22:02:05,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:02:05,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:05,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:05,472 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:02:05,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-15 22:02:05,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:02:05,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:02:05,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:05,820 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:05,820 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 22:02:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,123 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:06,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:06,125 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 22:02:06,132 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 22:02:06,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:06,922 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:06,923 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 22:02:06,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:06,950 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 22:02:10,185 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 22:02:10,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706724824] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:10,186 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:10,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 22:02:10,186 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1205271722] [2022-03-15 22:02:10,186 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:10,188 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:10,193 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:10,193 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:10,433 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13203#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:10,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:10,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:10,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:10,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:10,434 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 22:02:10,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:10,636 INFO L93 Difference]: Finished difference Result 331 states and 764 transitions. [2022-03-15 22:02:10,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:10,640 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 22:02:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:10,642 INFO L225 Difference]: With dead ends: 331 [2022-03-15 22:02:10,642 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 22:02:10,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:02:10,642 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 22:02:10,642 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 22:02:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 22:02:10,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 156. [2022-03-15 22:02:10,645 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 22:02:10,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 370 transitions. [2022-03-15 22:02:10,646 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 370 transitions. Word has length 24 [2022-03-15 22:02:10,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:10,646 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 370 transitions. [2022-03-15 22:02:10,646 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 22:02:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 370 transitions. [2022-03-15 22:02:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:10,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:10,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:10,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:10,863 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 22:02:10,863 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:10,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:10,863 INFO L85 PathProgramCache]: Analyzing trace with hash 164233434, now seen corresponding path program 24 times [2022-03-15 22:02:10,864 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:10,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642379200] [2022-03-15 22:02:10,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:10,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:11,105 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 22:02:11,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:11,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642379200] [2022-03-15 22:02:11,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642379200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:11,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160043988] [2022-03-15 22:02:11,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:02:11,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:11,107 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-15 22:02:11,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-15 22:02:11,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:02:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:11,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:11,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:12,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:12,130 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 22:02:13,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:13,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:13,359 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 22:02:13,872 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 22:02:13,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:16,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:16,761 INFO L353 Elim1Store]: treesize reduction 76, result has 65.0 percent of original size [2022-03-15 22:02:16,761 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 22:02:16,792 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:16,792 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 22:02:17,530 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 22:02:17,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160043988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:17,530 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:17,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 22:02:17,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574187860] [2022-03-15 22:02:17,530 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:17,532 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:17,536 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:02:17,537 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:17,627 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14022#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:02:17,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:02:17,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:02:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:02:17,628 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 22:02:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:17,842 INFO L93 Difference]: Finished difference Result 284 states and 638 transitions. [2022-03-15 22:02:17,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:02:17,842 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 22:02:17,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:17,843 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:02:17,843 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 22:02:17,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:02:17,844 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:17,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 1 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:02:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 22:02:17,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-03-15 22:02:17,847 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 22:02:17,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 406 transitions. [2022-03-15 22:02:17,847 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 406 transitions. Word has length 24 [2022-03-15 22:02:17,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:17,847 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 406 transitions. [2022-03-15 22:02:17,847 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 22:02:17,847 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 406 transitions. [2022-03-15 22:02:17,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:17,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:17,848 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:17,865 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 22:02:18,048 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 22:02:18,049 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:18,049 INFO L85 PathProgramCache]: Analyzing trace with hash -385086414, now seen corresponding path program 25 times [2022-03-15 22:02:18,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:18,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059514734] [2022-03-15 22:02:18,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:18,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:18,270 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 22:02:18,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:18,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059514734] [2022-03-15 22:02:18,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059514734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:18,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981370403] [2022-03-15 22:02:18,270 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:18,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:18,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:18,271 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 22:02:18,272 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 22:02:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:18,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:18,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:18,691 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:18,691 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 22:02:18,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:18,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:18,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:18,975 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 22:02:18,981 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 22:02:18,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:19,771 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:19,771 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 22:02:19,800 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:19,800 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 22:02:22,022 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 22:02:22,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981370403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:22,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:22,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 22:02:22,022 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1844178603] [2022-03-15 22:02:22,022 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:22,024 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:22,029 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:22,030 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:22,277 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14821#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:22,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:02:22,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:02:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:22,278 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 22:02:22,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:22,526 INFO L93 Difference]: Finished difference Result 494 states and 1157 transitions. [2022-03-15 22:02:22,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:02:22,526 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 22:02:22,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:22,528 INFO L225 Difference]: With dead ends: 494 [2022-03-15 22:02:22,528 INFO L226 Difference]: Without dead ends: 452 [2022-03-15 22:02:22,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:02:22,528 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:22,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 1 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:22,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-15 22:02:22,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 189. [2022-03-15 22:02:22,532 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 22:02:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 450 transitions. [2022-03-15 22:02:22,532 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 450 transitions. Word has length 24 [2022-03-15 22:02:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:22,533 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 450 transitions. [2022-03-15 22:02:22,533 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 22:02:22,533 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 450 transitions. [2022-03-15 22:02:22,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:22,533 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:22,533 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:22,549 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 22:02:22,743 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 22:02:22,743 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:22,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:22,744 INFO L85 PathProgramCache]: Analyzing trace with hash 530286430, now seen corresponding path program 26 times [2022-03-15 22:02:22,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:22,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544888652] [2022-03-15 22:02:22,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:22,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:22,973 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 22:02:22,974 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:22,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544888652] [2022-03-15 22:02:22,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544888652] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:22,974 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556752581] [2022-03-15 22:02:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:02:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:22,975 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 22:02:22,975 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 22:02:23,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:02:23,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:23,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:23,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:23,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:23,406 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 22:02:23,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:23,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:23,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:23,672 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 22:02:23,682 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 22:02:23,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:24,499 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:24,500 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 22:02:24,528 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:24,528 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 22:02:26,769 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 22:02:26,770 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556752581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:26,770 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:26,770 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-15 22:02:26,770 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1725864094] [2022-03-15 22:02:26,770 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:26,772 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:26,776 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:02:26,776 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:26,911 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [15870#(and (<= end (+ 2 start)) (<= (select queue (+ start 1)) (select A i)) ok (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start)) (<= (+ 2 start) end)), 15869#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:02:26,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:26,911 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:26,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:02:26,912 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 22:02:27,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:27,142 INFO L93 Difference]: Finished difference Result 381 states and 881 transitions. [2022-03-15 22:02:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:02:27,142 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 22:02:27,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:27,143 INFO L225 Difference]: With dead ends: 381 [2022-03-15 22:02:27,144 INFO L226 Difference]: Without dead ends: 348 [2022-03-15 22:02:27,144 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 22:02:27,144 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 22:02:27,144 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 22:02:27,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-15 22:02:27,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 210. [2022-03-15 22:02:27,148 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 22:02:27,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 504 transitions. [2022-03-15 22:02:27,148 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 504 transitions. Word has length 24 [2022-03-15 22:02:27,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:27,148 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 504 transitions. [2022-03-15 22:02:27,148 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 22:02:27,148 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 504 transitions. [2022-03-15 22:02:27,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:27,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:27,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:27,167 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 22:02:27,359 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 22:02:27,359 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:27,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:27,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1192290818, now seen corresponding path program 27 times [2022-03-15 22:02:27,361 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:27,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795438974] [2022-03-15 22:02:27,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:27,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:27,574 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 22:02:27,575 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:27,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795438974] [2022-03-15 22:02:27,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795438974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:27,575 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731150316] [2022-03-15 22:02:27,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:02:27,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:27,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:27,576 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 22:02:27,576 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 22:02:27,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:02:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:28,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:28,545 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 22:02:29,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:29,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:29,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 7 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 51 treesize of output 97 [2022-03-15 22:02:30,031 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 22:02:30,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:31,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:31,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:32,035 INFO L353 Elim1Store]: treesize reduction 16, result has 82.4 percent of original size [2022-03-15 22:02:32,036 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 6 new quantified variables, introduced 13 case distinctions, treesize of input 71 treesize of output 113 [2022-03-15 22:02:32,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:32,062 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 118 treesize of output 134 [2022-03-15 22:02:32,857 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 22:02:32,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731150316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:32,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:32,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-03-15 22:02:32,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1125872398] [2022-03-15 22:02:32,857 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:32,859 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:32,864 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:02:32,864 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:33,004 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [16847#(and (<= end (+ 2 start)) (<= (select queue (+ start 1)) (select A i)) ok (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start)) (<= (+ 2 start) end)), 16846#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:02:33,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:02:33,004 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:33,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:02:33,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:02:33,005 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 22:02:33,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:33,253 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2022-03-15 22:02:33,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:02:33,253 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 22:02:33,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:33,255 INFO L225 Difference]: With dead ends: 465 [2022-03-15 22:02:33,255 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 22:02:33,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:02:33,256 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 66 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:33,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 1 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 22:02:33,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 242. [2022-03-15 22:02:33,259 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 22:02:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 581 transitions. [2022-03-15 22:02:33,260 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 581 transitions. Word has length 24 [2022-03-15 22:02:33,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:33,260 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 581 transitions. [2022-03-15 22:02:33,260 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 22:02:33,260 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 581 transitions. [2022-03-15 22:02:33,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:33,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:33,261 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:33,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-15 22:02:33,461 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 22:02:33,461 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:33,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:33,461 INFO L85 PathProgramCache]: Analyzing trace with hash 105975194, now seen corresponding path program 28 times [2022-03-15 22:02:33,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:33,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855001127] [2022-03-15 22:02:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:33,710 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 22:02:33,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:33,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855001127] [2022-03-15 22:02:33,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855001127] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:33,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306673868] [2022-03-15 22:02:33,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:02:33,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:33,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:33,712 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 22:02:33,713 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 22:02:33,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:02:33,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:33,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:33,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:34,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:34,033 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 22:02:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:34,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:34,359 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 22:02:34,370 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 22:02:34,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:35,166 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:35,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 22:02:35,194 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:35,194 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 22:02:37,207 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 22:02:37,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306673868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:37,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:37,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 22:02:37,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [516207881] [2022-03-15 22:02:37,208 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:37,210 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:37,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:02:37,214 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:37,302 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17971#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:02:37,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:37,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:02:37,303 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 22:02:37,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:37,549 INFO L93 Difference]: Finished difference Result 479 states and 1148 transitions. [2022-03-15 22:02:37,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:37,549 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 22:02:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:37,550 INFO L225 Difference]: With dead ends: 479 [2022-03-15 22:02:37,550 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 22:02:37,551 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 22:02:37,559 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 43 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:37,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 1 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 22:02:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 281. [2022-03-15 22:02:37,563 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 22:02:37,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 675 transitions. [2022-03-15 22:02:37,564 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 675 transitions. Word has length 24 [2022-03-15 22:02:37,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:37,564 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 675 transitions. [2022-03-15 22:02:37,564 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 22:02:37,564 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 675 transitions. [2022-03-15 22:02:37,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:37,564 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:37,565 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:37,580 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 22:02:37,782 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 22:02:37,783 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:37,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1893152290, now seen corresponding path program 29 times [2022-03-15 22:02:37,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:37,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084838382] [2022-03-15 22:02:37,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:37,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:37,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:38,089 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 22:02:38,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:38,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084838382] [2022-03-15 22:02:38,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084838382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:38,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888139883] [2022-03-15 22:02:38,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:02:38,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:38,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:38,090 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 22:02:38,091 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 22:02:38,116 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:02:38,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:38,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:02:38,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:38,416 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:38,417 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 22:02:38,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:38,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:38,751 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 22:02:38,758 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 22:02:38,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:39,546 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:39,546 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 22:02:39,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:39,573 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 22:02:41,298 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 22:02:41,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888139883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:41,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:41,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 22:02:41,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2134465608] [2022-03-15 22:02:41,299 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:41,301 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:41,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:02:41,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:41,439 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19186#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:41,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:41,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:02:41,440 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 22:02:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:41,687 INFO L93 Difference]: Finished difference Result 526 states and 1254 transitions. [2022-03-15 22:02:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:02:41,687 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 22:02:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:41,689 INFO L225 Difference]: With dead ends: 526 [2022-03-15 22:02:41,689 INFO L226 Difference]: Without dead ends: 508 [2022-03-15 22:02:41,689 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 22:02:41,690 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:41,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 1 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:41,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-15 22:02:41,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 267. [2022-03-15 22:02:41,694 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 22:02:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 643 transitions. [2022-03-15 22:02:41,694 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 643 transitions. Word has length 24 [2022-03-15 22:02:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:41,694 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 643 transitions. [2022-03-15 22:02:41,695 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 22:02:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 643 transitions. [2022-03-15 22:02:41,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:41,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:41,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:41,711 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 22:02:41,896 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 22:02:41,896 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:41,896 INFO L85 PathProgramCache]: Analyzing trace with hash 572326002, now seen corresponding path program 30 times [2022-03-15 22:02:41,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:41,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033477697] [2022-03-15 22:02:41,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:41,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:42,190 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 22:02:42,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:42,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033477697] [2022-03-15 22:02:42,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033477697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:42,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845936114] [2022-03-15 22:02:42,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:02:42,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:42,191 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 22:02:42,192 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 22:02:42,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:02:42,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:42,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:42,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:42,497 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:42,497 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 22:02:42,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:42,916 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:42,916 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 22:02:44,212 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 22:02:44,212 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:45,598 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 22:02:45,598 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 22:02:45,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:45,622 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 22:02:46,196 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 22:02:46,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845936114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:46,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:46,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-03-15 22:02:46,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [176085964] [2022-03-15 22:02:46,197 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:46,199 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:46,204 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:46,204 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:46,454 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20426#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:46,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:46,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:46,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:46,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:02:46,455 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 22:02:46,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:46,663 INFO L93 Difference]: Finished difference Result 483 states and 1153 transitions. [2022-03-15 22:02:46,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:02:46,663 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 22:02:46,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:46,665 INFO L225 Difference]: With dead ends: 483 [2022-03-15 22:02:46,665 INFO L226 Difference]: Without dead ends: 474 [2022-03-15 22:02:46,665 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 22:02:46,665 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:46,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-15 22:02:46,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 265. [2022-03-15 22:02:46,676 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 22:02:46,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 641 transitions. [2022-03-15 22:02:46,676 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 641 transitions. Word has length 24 [2022-03-15 22:02:46,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:46,677 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 641 transitions. [2022-03-15 22:02:46,677 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 22:02:46,677 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 641 transitions. [2022-03-15 22:02:46,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:46,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:46,677 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:46,693 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 22:02:46,890 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 22:02:46,891 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:46,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1726384446, now seen corresponding path program 31 times [2022-03-15 22:02:46,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:46,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553921899] [2022-03-15 22:02:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:46,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:46,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:47,141 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 22:02:47,142 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:47,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553921899] [2022-03-15 22:02:47,142 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553921899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:47,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618374842] [2022-03-15 22:02:47,142 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:47,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:47,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:47,143 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 22:02:47,144 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 22:02:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:47,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:47,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:47,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:47,458 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 22:02:47,713 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 22:02:47,714 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 22:02:47,720 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 22:02:47,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:48,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:48,310 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 22:02:48,454 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:48,454 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 22:02:50,608 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 22:02:50,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618374842] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:50,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:50,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-15 22:02:50,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [219661531] [2022-03-15 22:02:50,609 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:50,611 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:50,616 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 60 transitions. [2022-03-15 22:02:50,616 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:50,998 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21610#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:02:50,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:50,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:50,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:50,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:50,999 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 22:02:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:51,247 INFO L93 Difference]: Finished difference Result 493 states and 1177 transitions. [2022-03-15 22:02:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:02:51,248 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 22:02:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:51,249 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:02:51,249 INFO L226 Difference]: Without dead ends: 484 [2022-03-15 22:02:51,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:02:51,250 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:51,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:51,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-03-15 22:02:51,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 270. [2022-03-15 22:02:51,254 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 22:02:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 653 transitions. [2022-03-15 22:02:51,254 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 653 transitions. Word has length 24 [2022-03-15 22:02:51,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:51,254 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 653 transitions. [2022-03-15 22:02:51,254 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 22:02:51,254 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 653 transitions. [2022-03-15 22:02:51,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 22:02:51,255 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:51,255 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:51,271 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 22:02:51,455 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 22:02:51,455 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:51,456 INFO L85 PathProgramCache]: Analyzing trace with hash 2068367090, now seen corresponding path program 32 times [2022-03-15 22:02:51,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:51,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469277402] [2022-03-15 22:02:51,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:51,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:51,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:51,495 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 22:02:51,496 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:51,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469277402] [2022-03-15 22:02:51,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469277402] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:51,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846451119] [2022-03-15 22:02:51,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:02:51,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:51,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:51,497 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 22:02:51,498 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 22:02:51,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:02:51,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:02:51,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:51,567 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 22:02:51,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:51,612 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 22:02:51,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846451119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:51,612 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:51,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 22:02:51,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [3714404] [2022-03-15 22:02:51,613 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:51,615 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:51,632 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 38 transitions. [2022-03-15 22:02:51,633 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:51,653 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:02:51,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 22:02:51,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 22:02:51,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:02:51,653 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 22:02:51,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:51,706 INFO L93 Difference]: Finished difference Result 451 states and 1044 transitions. [2022-03-15 22:02:51,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:02:51,707 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 22:02:51,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:51,708 INFO L225 Difference]: With dead ends: 451 [2022-03-15 22:02:51,708 INFO L226 Difference]: Without dead ends: 430 [2022-03-15 22:02:51,708 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 22:02:51,708 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 65 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:51,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:02:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-03-15 22:02:51,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 338. [2022-03-15 22:02:51,712 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 22:02:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 824 transitions. [2022-03-15 22:02:51,713 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 824 transitions. Word has length 26 [2022-03-15 22:02:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:51,713 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 824 transitions. [2022-03-15 22:02:51,713 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 22:02:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 824 transitions. [2022-03-15 22:02:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:51,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:51,714 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:51,748 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 22:02:51,927 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 22:02:51,927 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 23776897, now seen corresponding path program 33 times [2022-03-15 22:02:51,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:51,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498640082] [2022-03-15 22:02:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:51,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:52,201 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 22:02:52,202 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:52,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498640082] [2022-03-15 22:02:52,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498640082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:52,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989985748] [2022-03-15 22:02:52,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:02:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:52,203 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 22:02:52,203 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 22:02:52,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:02:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:02:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:53,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:53,319 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 22:02:54,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,246 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:54,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:54,332 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 22:02:57,627 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 22:02:57,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:13,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:13,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:13,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:13,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:13,402 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:03:13,402 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 22:03:13,448 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:13,449 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 22:03:19,008 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 22:03:19,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989985748] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:19,008 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:19,008 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 40 [2022-03-15 22:03:19,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1295837487] [2022-03-15 22:03:19,009 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:19,011 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:19,018 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:03:19,019 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:19,268 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24135#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:03:19,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:03:19,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:03:19,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1522, Unknown=3, NotChecked=0, Total=1806 [2022-03-15 22:03:19,269 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 22:03:19,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:19,524 INFO L93 Difference]: Finished difference Result 981 states and 2376 transitions. [2022-03-15 22:03:19,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:03:19,525 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 22:03:19,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:19,528 INFO L225 Difference]: With dead ends: 981 [2022-03-15 22:03:19,528 INFO L226 Difference]: Without dead ends: 939 [2022-03-15 22:03:19,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=322, Invalid=1745, Unknown=3, NotChecked=0, Total=2070 [2022-03-15 22:03:19,528 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:19,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:03:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-15 22:03:19,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 292. [2022-03-15 22:03:19,534 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 22:03:19,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 715 transitions. [2022-03-15 22:03:19,534 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 715 transitions. Word has length 28 [2022-03-15 22:03:19,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:19,534 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 715 transitions. [2022-03-15 22:03:19,534 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 22:03:19,534 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 715 transitions. [2022-03-15 22:03:19,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:19,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:19,535 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:19,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-15 22:03:19,750 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 22:03:19,751 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:19,751 INFO L85 PathProgramCache]: Analyzing trace with hash 939149741, now seen corresponding path program 34 times [2022-03-15 22:03:19,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:19,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998416145] [2022-03-15 22:03:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:19,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:19,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:20,046 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 22:03:20,046 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998416145] [2022-03-15 22:03:20,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998416145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:20,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244271193] [2022-03-15 22:03:20,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:03:20,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:20,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:20,048 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 22:03:20,049 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 22:03:20,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:03:20,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:20,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:03:20,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:20,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:20,726 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 74 treesize of output 128 [2022-03-15 22:03:21,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:21,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:21,114 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 22:03:21,126 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 22:03:21,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:22,568 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:03:22,568 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 22:03:22,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:22,616 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 22:03:36,837 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 22:03:36,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244271193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:36,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:36,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-03-15 22:03:36,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1704094281] [2022-03-15 22:03:36,838 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:36,841 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:36,848 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:03:36,848 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:36,999 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [25910#(and (<= end (+ 2 start)) (<= (select queue (+ start 1)) (select A i)) ok (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start)) (<= (+ 2 start) end)), 25909#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:03:36,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:03:36,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:36,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:03:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:03:37,000 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 22:03:37,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:37,312 INFO L93 Difference]: Finished difference Result 472 states and 1089 transitions. [2022-03-15 22:03:37,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:03:37,312 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 22:03:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:37,313 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:03:37,313 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 22:03:37,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=1573, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:03:37,314 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 63 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:37,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:03:37,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 22:03:37,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 274. [2022-03-15 22:03:37,318 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 22:03:37,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 665 transitions. [2022-03-15 22:03:37,318 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 665 transitions. Word has length 28 [2022-03-15 22:03:37,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:37,318 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 665 transitions. [2022-03-15 22:03:37,318 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 22:03:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 665 transitions. [2022-03-15 22:03:37,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:37,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:37,319 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:37,335 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 22:03:37,534 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 22:03:37,535 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:37,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:37,535 INFO L85 PathProgramCache]: Analyzing trace with hash 514838505, now seen corresponding path program 35 times [2022-03-15 22:03:37,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:37,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967264903] [2022-03-15 22:03:37,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:37,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:37,857 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 22:03:37,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:37,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967264903] [2022-03-15 22:03:37,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967264903] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:37,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978480495] [2022-03-15 22:03:37,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:03:37,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:37,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:37,858 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 22:03:37,859 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 22:03:37,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 22:03:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:03:37,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:38,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:38,413 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 22:03:38,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:38,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:38,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:38,870 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 22:03:38,881 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 22:03:38,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:40,339 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:03:40,339 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 22:03:40,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:40,388 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 22:03:46,380 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 22:03:46,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978480495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:46,381 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:46,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 22:03:46,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1881472232] [2022-03-15 22:03:46,381 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:46,384 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:46,390 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:03:46,390 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:46,482 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27138#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:03:46,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:03:46,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:46,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:03:46,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:03:46,483 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 22:03:46,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:46,802 INFO L93 Difference]: Finished difference Result 493 states and 1180 transitions. [2022-03-15 22:03:46,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:03:46,802 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 22:03:46,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:46,804 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:03:46,804 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 22:03:46,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=1561, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:03:46,805 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:03:46,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:03:46,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 22:03:46,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2022-03-15 22:03:46,809 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 22:03:46,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 711 transitions. [2022-03-15 22:03:46,809 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 711 transitions. Word has length 28 [2022-03-15 22:03:46,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:46,809 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 711 transitions. [2022-03-15 22:03:46,809 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 22:03:46,809 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 711 transitions. [2022-03-15 22:03:46,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:46,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:46,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:46,826 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 22:03:47,026 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 22:03:47,026 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:47,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1992951695, now seen corresponding path program 36 times [2022-03-15 22:03:47,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:47,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199898063] [2022-03-15 22:03:47,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:47,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:47,336 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 22:03:47,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:47,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199898063] [2022-03-15 22:03:47,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199898063] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:47,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592097677] [2022-03-15 22:03:47,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:03:47,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:47,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:47,337 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 22:03:47,338 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 22:03:47,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:03:47,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:03:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:47,998 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:47,998 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 22:03:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:49,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:49,260 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:49,260 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 22:03:54,009 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 5 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:03:54,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:09,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:09,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:09,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:09,451 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:04:09,452 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 22:04:09,499 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:09,499 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 22:04:12,099 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 22:04:12,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592097677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:12,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:12,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:04:12,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [679052883] [2022-03-15 22:04:12,100 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:12,103 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:12,110 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:04:12,110 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:12,258 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [28430#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:04:12,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:12,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:12,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:12,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1649, Unknown=2, NotChecked=0, Total=1980 [2022-03-15 22:04:12,259 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 22:04:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:12,553 INFO L93 Difference]: Finished difference Result 629 states and 1501 transitions. [2022-03-15 22:04:12,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:04:12,553 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 22:04:12,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:12,555 INFO L225 Difference]: With dead ends: 629 [2022-03-15 22:04:12,555 INFO L226 Difference]: Without dead ends: 601 [2022-03-15 22:04:12,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=380, Invalid=1874, Unknown=2, NotChecked=0, Total=2256 [2022-03-15 22:04:12,556 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:12,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:04:12,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-03-15 22:04:12,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 274. [2022-03-15 22:04:12,560 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 22:04:12,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 661 transitions. [2022-03-15 22:04:12,560 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 661 transitions. Word has length 28 [2022-03-15 22:04:12,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:12,560 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 661 transitions. [2022-03-15 22:04:12,560 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 22:04:12,560 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 661 transitions. [2022-03-15 22:04:12,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:12,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:12,561 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:12,577 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 22:04:12,768 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 22:04:12,768 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:12,768 INFO L85 PathProgramCache]: Analyzing trace with hash 981189313, now seen corresponding path program 37 times [2022-03-15 22:04:12,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:12,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682322804] [2022-03-15 22:04:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:12,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:13,118 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 22:04:13,119 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:13,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682322804] [2022-03-15 22:04:13,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682322804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:13,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835810809] [2022-03-15 22:04:13,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:04:13,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:13,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:13,120 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 22:04:13,120 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 22:04:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:13,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:13,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:13,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:13,686 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 22:04:14,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:14,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:14,184 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 22:04:14,191 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 22:04:14,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:15,643 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:04:15,643 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 22:04:15,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:15,698 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 22:04:26,098 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 22:04:26,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835810809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:26,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:26,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 22:04:26,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [142850779] [2022-03-15 22:04:26,099 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:26,102 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:26,109 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:04:26,109 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:26,353 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29815#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:04:26,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:26,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:26,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:26,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:04:26,355 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 22:04:26,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:26,574 INFO L93 Difference]: Finished difference Result 574 states and 1370 transitions. [2022-03-15 22:04:26,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:04:26,574 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 22:04:26,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:26,576 INFO L225 Difference]: With dead ends: 574 [2022-03-15 22:04:26,576 INFO L226 Difference]: Without dead ends: 551 [2022-03-15 22:04:26,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=290, Invalid=1432, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:04:26,576 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 91 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:26,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:04:26,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-15 22:04:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 244. [2022-03-15 22:04:26,580 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 22:04:26,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 591 transitions. [2022-03-15 22:04:26,580 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 591 transitions. Word has length 28 [2022-03-15 22:04:26,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:26,580 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 591 transitions. [2022-03-15 22:04:26,580 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 22:04:26,580 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 591 transitions. [2022-03-15 22:04:26,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:26,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:26,581 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:26,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-15 22:04:26,781 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 22:04:26,781 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:26,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1317521135, now seen corresponding path program 38 times [2022-03-15 22:04:26,782 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:26,782 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568465220] [2022-03-15 22:04:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:26,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:27,086 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 22:04:27,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568465220] [2022-03-15 22:04:27,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568465220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:27,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287019559] [2022-03-15 22:04:27,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:04:27,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:27,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:27,088 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 22:04:27,088 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 22:04:27,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:04:27,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:04:27,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:27,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:27,720 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 22:04:33,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:33,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:33,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:33,855 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 22:04:35,011 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 22:04:35,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:43,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:44,099 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:04:44,099 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 22:04:44,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:44,156 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 22:04:47,242 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 22:04:47,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287019559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:47,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:47,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:04:47,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [290316143] [2022-03-15 22:04:47,243 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:47,245 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:47,253 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:04:47,253 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:47,628 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31088#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:04:47,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:47,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:47,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:47,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1643, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:04:47,628 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 22:04:47,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:47,903 INFO L93 Difference]: Finished difference Result 489 states and 1155 transitions. [2022-03-15 22:04:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:04:47,903 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 22:04:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:47,905 INFO L225 Difference]: With dead ends: 489 [2022-03-15 22:04:47,905 INFO L226 Difference]: Without dead ends: 462 [2022-03-15 22:04:47,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=361, Invalid=1801, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:04:47,905 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 97 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:47,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 1 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:04:47,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-15 22:04:47,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 230. [2022-03-15 22:04:47,909 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 22:04:47,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 557 transitions. [2022-03-15 22:04:47,909 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 557 transitions. Word has length 28 [2022-03-15 22:04:47,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:47,909 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 557 transitions. [2022-03-15 22:04:47,909 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 22:04:47,909 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 557 transitions. [2022-03-15 22:04:47,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:47,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:47,910 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:47,926 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 22:04:48,116 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 22:04:48,116 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:48,116 INFO L85 PathProgramCache]: Analyzing trace with hash 272044009, now seen corresponding path program 39 times [2022-03-15 22:04:48,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:48,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121219050] [2022-03-15 22:04:48,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:48,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:48,397 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 22:04:48,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:48,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121219050] [2022-03-15 22:04:48,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121219050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:48,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18484595] [2022-03-15 22:04:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:04:48,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:48,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:48,399 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 22:04:48,399 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 22:04:48,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:04:48,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:48,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:50,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:50,474 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 22:04:50,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:50,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:50,931 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 22:04:52,058 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 22:04:52,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:53,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:53,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:53,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:53,886 INFO L353 Elim1Store]: treesize reduction 22, result has 81.2 percent of original size [2022-03-15 22:04:53,886 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 22:04:53,930 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:53,930 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 22:04:55,749 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 22:04:55,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18484595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:55,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:55,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:04:55,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1637582480] [2022-03-15 22:04:55,749 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:55,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:55,758 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:04:55,758 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:55,876 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32246#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:04:55,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:04:55,877 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:04:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:04:55,877 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 22:04:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:56,189 INFO L93 Difference]: Finished difference Result 435 states and 1004 transitions. [2022-03-15 22:04:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:04:56,190 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 22:04:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:56,191 INFO L225 Difference]: With dead ends: 435 [2022-03-15 22:04:56,191 INFO L226 Difference]: Without dead ends: 376 [2022-03-15 22:04:56,191 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 22:04:56,191 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:56,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:04:56,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-15 22:04:56,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 257. [2022-03-15 22:04:56,195 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 22:04:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 623 transitions. [2022-03-15 22:04:56,195 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 623 transitions. Word has length 28 [2022-03-15 22:04:56,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:56,195 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 623 transitions. [2022-03-15 22:04:56,195 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 22:04:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 623 transitions. [2022-03-15 22:04:56,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:56,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:56,196 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:56,213 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 22:04:56,408 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 22:04:56,408 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:56,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1618573871, now seen corresponding path program 40 times [2022-03-15 22:04:56,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:56,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890323777] [2022-03-15 22:04:56,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:56,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:56,729 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 22:04:56,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:56,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890323777] [2022-03-15 22:04:56,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890323777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:56,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472074983] [2022-03-15 22:04:56,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:04:56,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:56,730 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 22:04:56,731 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 22:04:56,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:04:56,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:56,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:56,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:57,389 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:57,389 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 22:04:57,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,855 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 22:04:57,869 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 22:04:57,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:58,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:58,959 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 22:04:59,286 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:04:59,286 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 22:05:03,216 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 22:05:03,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472074983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:03,216 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:03,216 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 22:05:03,216 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [205509049] [2022-03-15 22:05:03,216 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:03,219 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:03,238 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:05:03,238 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:03,633 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33400#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:05:03,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:05:03,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:05:03,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:05:03,634 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 22:05:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:04,011 INFO L93 Difference]: Finished difference Result 816 states and 1947 transitions. [2022-03-15 22:05:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:05:04,012 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 22:05:04,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:04,014 INFO L225 Difference]: With dead ends: 816 [2022-03-15 22:05:04,014 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 22:05:04,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:05:04,015 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 77 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:04,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:05:04,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 22:05:04,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 283. [2022-03-15 22:05:04,019 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 22:05:04,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 687 transitions. [2022-03-15 22:05:04,020 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 687 transitions. Word has length 28 [2022-03-15 22:05:04,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:04,020 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 687 transitions. [2022-03-15 22:05:04,020 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 22:05:04,020 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 687 transitions. [2022-03-15 22:05:04,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:04,021 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:04,021 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:04,037 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 22:05:04,234 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 22:05:04,234 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 905320877, now seen corresponding path program 41 times [2022-03-15 22:05:04,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:04,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202980277] [2022-03-15 22:05:04,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:04,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:04,582 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 22:05:04,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:04,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202980277] [2022-03-15 22:05:04,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202980277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:04,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364236277] [2022-03-15 22:05:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:05:04,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:04,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:04,584 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 22:05:04,585 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 22:05:04,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:05:04,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:04,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:05:04,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:05,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:05,283 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 22:05:05,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:05,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:05,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:05,801 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 22:05:05,812 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 22:05:05,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:07,265 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:05:07,266 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 22:05:07,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:07,317 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 273 treesize of output 293 [2022-03-15 22:05:15,996 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 22:05:15,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364236277] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:15,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:15,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-03-15 22:05:15,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2073968673] [2022-03-15 22:05:15,997 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:15,999 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:16,005 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:05:16,005 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:16,172 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [34994#(and (<= (select queue (+ start 1)) (select queue (+ 2 start))) ok (<= (select queue (+ 2 start)) (select A i)) (<= (+ 3 start) end) (<= end (+ 3 start)) (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start))), 34993#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:05:16,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:05:16,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:16,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:05:16,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:16,173 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 22:05:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:16,523 INFO L93 Difference]: Finished difference Result 561 states and 1327 transitions. [2022-03-15 22:05:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:05:16,523 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 22:05:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:16,524 INFO L225 Difference]: With dead ends: 561 [2022-03-15 22:05:16,524 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 22:05:16,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=339, Invalid=1641, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:16,525 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 71 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:16,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 1 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:16,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 22:05:16,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 318. [2022-03-15 22:05:16,529 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 22:05:16,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 777 transitions. [2022-03-15 22:05:16,529 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 777 transitions. Word has length 28 [2022-03-15 22:05:16,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:16,530 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 777 transitions. [2022-03-15 22:05:16,530 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 22:05:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 777 transitions. [2022-03-15 22:05:16,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:16,530 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:16,530 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:16,546 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 22:05:16,735 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 22:05:16,735 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:16,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:16,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1194208867, now seen corresponding path program 42 times [2022-03-15 22:05:16,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:16,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855288232] [2022-03-15 22:05:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:16,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:17,067 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 22:05:17,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:17,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855288232] [2022-03-15 22:05:17,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855288232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:17,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619198799] [2022-03-15 22:05:17,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:05:17,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:17,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:17,069 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 22:05:17,070 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 22:05:17,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:05:17,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:17,100 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 22:05:17,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:19,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:19,569 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 22:05:19,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:19,996 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:19,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 88 treesize of output 180 [2022-03-15 22:05:21,230 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 22:05:21,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:23,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:23,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:23,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:23,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,074 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:23,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:23,093 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:23,094 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 6 new quantified variables, introduced 9 case distinctions, treesize of input 94 treesize of output 96 [2022-03-15 22:05:23,135 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:23,135 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 102 treesize of output 150 [2022-03-15 22:05:23,925 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 22:05:23,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619198799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:23,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:23,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:05:23,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [458180069] [2022-03-15 22:05:23,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:23,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:23,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:05:23,935 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:24,121 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [36399#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start)))), 36398#(and (<= (select queue (+ start 1)) (select queue (+ 2 start))) ok (<= (select queue (+ 2 start)) (select A i)) (<= (+ 3 start) end) (<= end (+ 3 start)) (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start)))] [2022-03-15 22:05:24,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:05:24,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:24,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:05:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:24,122 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 22:05:24,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:24,510 INFO L93 Difference]: Finished difference Result 682 states and 1600 transitions. [2022-03-15 22:05:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:05:24,510 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 22:05:24,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:24,512 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:05:24,512 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 22:05:24,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:24,512 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:24,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 22:05:24,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 368. [2022-03-15 22:05:24,517 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 22:05:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 898 transitions. [2022-03-15 22:05:24,518 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 898 transitions. Word has length 28 [2022-03-15 22:05:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 898 transitions. [2022-03-15 22:05:24,518 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 22:05:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 898 transitions. [2022-03-15 22:05:24,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:24,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:24,518 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:24,534 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 22:05:24,734 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 22:05:24,734 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1164116201, now seen corresponding path program 43 times [2022-03-15 22:05:24,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:24,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251080465] [2022-03-15 22:05:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:24,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:25,109 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 22:05:25,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:25,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251080465] [2022-03-15 22:05:25,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251080465] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:25,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636341155] [2022-03-15 22:05:25,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:05:25,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:25,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:25,111 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 22:05:25,112 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 22:05:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:25,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:05:25,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:25,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:25,663 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 22:05:26,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:26,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:26,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:26,268 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 22:05:26,301 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 22:05:26,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:27,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:27,496 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 22:05:27,797 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:05:27,798 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 22:05:33,443 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 22:05:33,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636341155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:33,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:33,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2022-03-15 22:05:33,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1873152538] [2022-03-15 22:05:33,443 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:33,446 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:33,452 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:05:33,452 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:33,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38025#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:05:33,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:05:33,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:05:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:33,559 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 22:05:33,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:33,911 INFO L93 Difference]: Finished difference Result 682 states and 1659 transitions. [2022-03-15 22:05:33,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:05:33,912 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 22:05:33,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:33,914 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:05:33,914 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 22:05:33,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:33,914 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:33,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 1 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 650 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 22:05:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 431. [2022-03-15 22:05:33,920 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 22:05:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1048 transitions. [2022-03-15 22:05:33,921 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1048 transitions. Word has length 28 [2022-03-15 22:05:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:33,922 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1048 transitions. [2022-03-15 22:05:33,922 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 22:05:33,922 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1048 transitions. [2022-03-15 22:05:33,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:33,922 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:33,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:33,947 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 22:05:34,136 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 22:05:34,136 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:34,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1343673999, now seen corresponding path program 44 times [2022-03-15 22:05:34,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:34,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131234268] [2022-03-15 22:05:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:34,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:34,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:34,523 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 22:05:34,524 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:34,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131234268] [2022-03-15 22:05:34,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131234268] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:34,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660947550] [2022-03-15 22:05:34,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:05:34,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:34,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:34,525 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 22:05:34,527 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 22:05:34,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:05:34,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:34,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:05:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:35,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:35,184 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 22:05:40,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:40,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:40,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:40,100 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 22:05:41,243 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 22:05:41,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:49,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:49,843 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:05:49,843 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 22:05:49,914 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:49,915 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 22:06:29,050 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 22:06:29,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660947550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:29,050 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:29,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:06:29,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1600602335] [2022-03-15 22:06:29,050 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:29,053 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:29,060 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:06:29,060 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:29,221 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39780#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:06:29,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:29,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:29,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1762, Unknown=1, NotChecked=0, Total=2162 [2022-03-15 22:06:29,222 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 22:06:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:29,641 INFO L93 Difference]: Finished difference Result 750 states and 1817 transitions. [2022-03-15 22:06:29,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:06:29,642 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 22:06:29,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:29,644 INFO L225 Difference]: With dead ends: 750 [2022-03-15 22:06:29,644 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 22:06:29,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=459, Invalid=1892, Unknown=1, NotChecked=0, Total=2352 [2022-03-15 22:06:29,644 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:29,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 1 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:06:29,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 22:06:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 405. [2022-03-15 22:06:29,650 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 22:06:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 986 transitions. [2022-03-15 22:06:29,650 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 986 transitions. Word has length 28 [2022-03-15 22:06:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:29,651 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 986 transitions. [2022-03-15 22:06:29,651 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 22:06:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 986 transitions. [2022-03-15 22:06:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:29,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:29,651 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:29,667 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 22:06:29,852 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 22:06:29,852 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1630467009, now seen corresponding path program 45 times [2022-03-15 22:06:29,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:29,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035341789] [2022-03-15 22:06:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:30,265 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 22:06:30,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:30,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035341789] [2022-03-15 22:06:30,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035341789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:30,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267572591] [2022-03-15 22:06:30,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:06:30,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:30,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:30,273 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 22:06:30,274 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 22:06:30,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:06:30,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:30,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:06:30,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:31,001 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:31,001 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 22:06:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:31,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:31,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:31,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 18 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 56 [2022-03-15 22:06:31,792 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 22:06:31,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:33,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:33,622 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 81 treesize of output 133 [2022-03-15 22:06:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:33,785 INFO L353 Elim1Store]: treesize reduction 50, result has 73.8 percent of original size [2022-03-15 22:06:33,786 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 21 case distinctions, treesize of input 215 treesize of output 255 [2022-03-15 22:06:39,456 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 22:06:39,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267572591] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:39,456 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:39,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:06:39,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [158422107] [2022-03-15 22:06:39,456 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:39,459 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:39,466 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:06:39,466 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:39,756 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41553#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:06:39,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:39,756 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:39,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:39,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:06:39,757 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 22:06:40,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:40,111 INFO L93 Difference]: Finished difference Result 705 states and 1714 transitions. [2022-03-15 22:06:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:06:40,111 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 22:06:40,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:40,113 INFO L225 Difference]: With dead ends: 705 [2022-03-15 22:06:40,113 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 22:06:40,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:06:40,114 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:40,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 1 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:06:40,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 22:06:40,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 397. [2022-03-15 22:06:40,119 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 22:06:40,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 970 transitions. [2022-03-15 22:06:40,119 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 970 transitions. Word has length 28 [2022-03-15 22:06:40,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:40,120 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 970 transitions. [2022-03-15 22:06:40,120 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 22:06:40,120 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 970 transitions. [2022-03-15 22:06:40,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:40,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:40,120 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:40,139 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 22:06:40,335 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 22:06:40,336 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:40,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:40,336 INFO L85 PathProgramCache]: Analyzing trace with hash -668243439, now seen corresponding path program 46 times [2022-03-15 22:06:40,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:40,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509666511] [2022-03-15 22:06:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:40,811 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 22:06:40,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:40,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509666511] [2022-03-15 22:06:40,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509666511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:40,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467844939] [2022-03-15 22:06:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:06:40,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:40,824 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 22:06:40,826 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 22:06:40,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:06:40,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:40,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:06:40,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:41,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:41,413 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 22:06:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,042 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:42,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:42,043 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 22:06:42,051 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 22:06:42,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:43,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:43,297 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 22:06:43,672 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:06:43,672 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 22:06:51,422 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 22:06:51,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467844939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:51,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:51,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-03-15 22:06:51,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [345418475] [2022-03-15 22:06:51,422 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:51,425 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:51,433 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:06:51,433 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:51,864 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43257#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:06:51,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:51,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:51,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:06:51,865 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 22:06:52,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:52,234 INFO L93 Difference]: Finished difference Result 673 states and 1632 transitions. [2022-03-15 22:06:52,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:06:52,234 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 22:06:52,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:52,236 INFO L225 Difference]: With dead ends: 673 [2022-03-15 22:06:52,237 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 22:06:52,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:06:52,237 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:06:52,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 1 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:06:52,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 22:06:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 395. [2022-03-15 22:06:52,242 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 22:06:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 968 transitions. [2022-03-15 22:06:52,243 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 968 transitions. Word has length 28 [2022-03-15 22:06:52,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:52,243 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 968 transitions. [2022-03-15 22:06:52,243 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 22:06:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 968 transitions. [2022-03-15 22:06:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:52,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:52,244 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:52,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-15 22:06:52,454 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 22:06:52,454 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:52,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2115793823, now seen corresponding path program 47 times [2022-03-15 22:06:52,456 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:52,456 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194666215] [2022-03-15 22:06:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:52,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:52,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:52,854 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 22:06:52,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:52,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194666215] [2022-03-15 22:06:52,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194666215] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:52,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583364017] [2022-03-15 22:06:52,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:06:52,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:52,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:52,860 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 22:06:52,861 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 22:06:52,887 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:06:52,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:52,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 22:06:52,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:53,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:53,456 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 22:06:53,889 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 22:06:53,889 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 55 treesize of output 19 [2022-03-15 22:06:53,897 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 22:06:53,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:55,396 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:06:55,396 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 98 treesize of output 288 [2022-03-15 22:06:55,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:55,453 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 273 treesize of output 293 [2022-03-15 22:07:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:07:12,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583364017] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:12,013 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:12,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2022-03-15 22:07:12,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1310246243] [2022-03-15 22:07:12,013 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:12,016 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:12,025 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 72 transitions. [2022-03-15 22:07:12,026 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:12,654 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [44923#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ start 4))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:07:12,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:12,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:07:12,655 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 22:07:13,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:13,014 INFO L93 Difference]: Finished difference Result 683 states and 1656 transitions. [2022-03-15 22:07:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:07:13,015 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 22:07:13,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:13,017 INFO L225 Difference]: With dead ends: 683 [2022-03-15 22:07:13,017 INFO L226 Difference]: Without dead ends: 674 [2022-03-15 22:07:13,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=253, Invalid=1307, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:07:13,018 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 82 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:13,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 1 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:07:13,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-15 22:07:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-03-15 22:07:13,024 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 22:07:13,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 980 transitions. [2022-03-15 22:07:13,025 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 980 transitions. Word has length 28 [2022-03-15 22:07:13,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:13,026 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 980 transitions. [2022-03-15 22:07:13,026 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 22:07:13,026 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 980 transitions. [2022-03-15 22:07:13,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 22:07:13,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:13,027 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:13,051 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 22:07:13,243 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 22:07:13,243 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:13,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1034625665, now seen corresponding path program 48 times [2022-03-15 22:07:13,245 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:13,245 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823933299] [2022-03-15 22:07:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:13,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:13,333 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 22:07:13,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:13,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823933299] [2022-03-15 22:07:13,333 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823933299] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:13,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137165106] [2022-03-15 22:07:13,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:07:13,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:13,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:13,334 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 22:07:13,364 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 22:07:13,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 22:07:13,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:13,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:07:13,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:13,414 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 22:07:13,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:13,463 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 22:07:13,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137165106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:13,464 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:13,464 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 22:07:13,464 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [627974667] [2022-03-15 22:07:13,464 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:13,467 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:13,474 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 42 transitions. [2022-03-15 22:07:13,474 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:13,499 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:07:13,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:07:13,500 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:13,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:07:13,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:13,500 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 22:07:13,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:13,574 INFO L93 Difference]: Finished difference Result 659 states and 1558 transitions. [2022-03-15 22:07:13,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:07:13,574 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 22:07:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:13,576 INFO L225 Difference]: With dead ends: 659 [2022-03-15 22:07:13,576 INFO L226 Difference]: Without dead ends: 634 [2022-03-15 22:07:13,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:13,577 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 87 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:13,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:07:13,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-03-15 22:07:13,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 486. [2022-03-15 22:07:13,586 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 22:07:13,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1197 transitions. [2022-03-15 22:07:13,586 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1197 transitions. Word has length 30 [2022-03-15 22:07:13,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:13,587 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1197 transitions. [2022-03-15 22:07:13,587 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 22:07:13,587 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1197 transitions. [2022-03-15 22:07:13,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:13,587 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:13,587 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:13,603 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 22:07:13,799 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 22:07:13,799 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:13,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:13,800 INFO L85 PathProgramCache]: Analyzing trace with hash 185436320, now seen corresponding path program 49 times [2022-03-15 22:07:13,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:13,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424717452] [2022-03-15 22:07:13,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:13,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:14,217 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 22:07:14,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:14,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424717452] [2022-03-15 22:07:14,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424717452] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:14,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285430305] [2022-03-15 22:07:14,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:07:14,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:14,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:14,219 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 22:07:14,220 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 22:07:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:14,248 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:14,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:15,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:15,351 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 22:07:16,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:16,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:16,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 22:07:16,090 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 22:07:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:18,909 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:07:18,909 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 22:07:19,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:19,018 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 22:07:52,524 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 22:07:52,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285430305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:52,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:52,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-03-15 22:07:52,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [715778873] [2022-03-15 22:07:52,524 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:52,528 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:52,538 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:07:52,538 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:53,024 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [48454#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:07:53,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:53,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:07:53,024 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 22:07:53,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:53,526 INFO L93 Difference]: Finished difference Result 1635 states and 4004 transitions. [2022-03-15 22:07:53,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:07:53,527 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 22:07:53,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:53,530 INFO L225 Difference]: With dead ends: 1635 [2022-03-15 22:07:53,530 INFO L226 Difference]: Without dead ends: 1566 [2022-03-15 22:07:53,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:07:53,531 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:07:53,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 1 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:07:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-15 22:07:53,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 408. [2022-03-15 22:07:53,539 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 22:07:53,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1010 transitions. [2022-03-15 22:07:53,540 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1010 transitions. Word has length 32 [2022-03-15 22:07:53,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:53,540 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1010 transitions. [2022-03-15 22:07:53,540 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 22:07:53,540 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1010 transitions. [2022-03-15 22:07:53,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:53,541 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:53,541 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:53,557 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 22:07:53,756 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 22:07:53,757 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:53,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:53,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1585636228, now seen corresponding path program 50 times [2022-03-15 22:07:53,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:53,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936469669] [2022-03-15 22:07:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:53,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:53,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:54,222 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 22:07:54,222 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:54,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936469669] [2022-03-15 22:07:54,222 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936469669] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:54,222 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883067642] [2022-03-15 22:07:54,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:07:54,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:54,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:54,224 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 22:07:54,224 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 22:07:54,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:07:54,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:54,255 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:54,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:55,341 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:55,341 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 22:07:56,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:56,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:56,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:56,041 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 22:07:56,052 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 22:07:56,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:59,039 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:07:59,040 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 22:07:59,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:59,129 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 22:08:12,921 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 22:08:12,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883067642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:12,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:12,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-03-15 22:08:12,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [308259830] [2022-03-15 22:08:12,922 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:12,924 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:12,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:08:12,933 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:13,146 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [51151#(and (<= (select queue (+ start 1)) (select queue (+ 2 start))) ok (<= (select queue (+ 2 start)) (select A i)) (<= (+ 3 start) end) (<= end (+ 3 start)) (<= (select queue start) (select queue (+ start 1))) (<= v_old (select queue start))), 51150#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:08:13,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:08:13,146 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:08:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:08:13,146 INFO L87 Difference]: Start difference. First operand 408 states and 1010 transitions. Second operand has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 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 22:08:13,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:13,705 INFO L93 Difference]: Finished difference Result 675 states and 1585 transitions. [2022-03-15 22:08:13,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:08:13,706 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 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 22:08:13,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:13,707 INFO L225 Difference]: With dead ends: 675 [2022-03-15 22:08:13,707 INFO L226 Difference]: Without dead ends: 599 [2022-03-15 22:08:13,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=431, Invalid=2431, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:08:13,708 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 89 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-15 22:08:13,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-15 22:08:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-15 22:08:13,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 386. [2022-03-15 22:08:13,713 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 22:08:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 950 transitions. [2022-03-15 22:08:13,713 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 950 transitions. Word has length 32 [2022-03-15 22:08:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:13,713 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 950 transitions. [2022-03-15 22:08:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.95) internal successors, (39), 20 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 22:08:13,714 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 950 transitions. [2022-03-15 22:08:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:13,714 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:13,714 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:13,730 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 22:08:13,927 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 22:08:13,927 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1326840904, now seen corresponding path program 51 times [2022-03-15 22:08:13,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:13,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736540757] [2022-03-15 22:08:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:13,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:13,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:14,375 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 22:08:14,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736540757] [2022-03-15 22:08:14,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736540757] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:14,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496112799] [2022-03-15 22:08:14,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:08:14,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:14,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:14,377 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 22:08:14,377 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 22:08:14,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 22:08:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:08:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:15,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:15,940 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 22:08:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:17,786 INFO L353 Elim1Store]: treesize reduction 44, result has 83.4 percent of original size [2022-03-15 22:08:17,787 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 22:08:27,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:27,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:09:09,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:09,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:09:09,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:09,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:09,790 INFO L353 Elim1Store]: treesize reduction 108, result has 69.4 percent of original size [2022-03-15 22:09:09,790 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 22:09:09,882 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:09:09,882 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 22:10:43,761 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 22:10:43,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496112799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:10:43,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:10:43,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2022-03-15 22:10:43,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1149482658] [2022-03-15 22:10:43,762 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:10:43,764 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:10:43,773 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 44 transitions. [2022-03-15 22:10:43,773 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:10:43,915 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [52841#(and (or ok (<= end start)) (or (<= end start) (<= v_old (select queue start))))] [2022-03-15 22:10:43,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:10:43,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:10:43,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:10:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2322, Unknown=13, NotChecked=0, Total=2756 [2022-03-15 22:10:43,916 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 22:10:44,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:10:44,374 INFO L93 Difference]: Finished difference Result 718 states and 1745 transitions. [2022-03-15 22:10:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:10:44,375 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 22:10:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:10:44,376 INFO L225 Difference]: With dead ends: 718 [2022-03-15 22:10:44,376 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 22:10:44,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=471, Invalid=2486, Unknown=13, NotChecked=0, Total=2970 [2022-03-15 22:10:44,376 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 81 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:10:44,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 1 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:10:44,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 22:10:44,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 418. [2022-03-15 22:10:44,382 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 22:10:44,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1024 transitions. [2022-03-15 22:10:44,382 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1024 transitions. Word has length 32 [2022-03-15 22:10:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:10:44,382 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1024 transitions. [2022-03-15 22:10:44,382 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 22:10:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1024 transitions. [2022-03-15 22:10:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:10:44,383 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:10:44,383 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:10:44,409 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 22:10:44,599 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 22:10:44,599 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:10:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:10:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash 460336192, now seen corresponding path program 52 times [2022-03-15 22:10:44,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:10:44,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672047110] [2022-03-15 22:10:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:10:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:10:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:10:45,105 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 22:10:45,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:10:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672047110] [2022-03-15 22:10:45,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672047110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:10:45,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393609429] [2022-03-15 22:10:45,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:10:45,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:10:45,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:10:45,106 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 22:10:45,107 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 22:10:45,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:10:45,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:10:45,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:10:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:10:46,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:46,051 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 90 treesize of output 178 [2022-03-15 22:10:46,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:10:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:10:46,955 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 22:10:46,969 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 22:10:46,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:10:49,915 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:10:49,915 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 22:10:50,009 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:10:50,009 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 22:11:11,749 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 22:11:11,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393609429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:11:11,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:11:11,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 22:11:11,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [526534735] [2022-03-15 22:11:11,750 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:11:11,752 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:11:11,761 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 52 transitions. [2022-03-15 22:11:11,761 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:11:11,915 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [54635#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:11:11,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:11:11,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:11:11,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:11:11,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:11:11,916 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 22:11:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:11:12,383 INFO L93 Difference]: Finished difference Result 975 states and 2376 transitions. [2022-03-15 22:11:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:11:12,383 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 22:11:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:11:12,385 INFO L225 Difference]: With dead ends: 975 [2022-03-15 22:11:12,385 INFO L226 Difference]: Without dead ends: 947 [2022-03-15 22:11:12,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:11:12,386 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 86 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:11:12,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:11:12,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-15 22:11:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 388. [2022-03-15 22:11:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.449612403100775) internal successors, (948), 387 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:11:12,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 948 transitions. [2022-03-15 22:11:12,392 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 948 transitions. Word has length 32 [2022-03-15 22:11:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:11:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 948 transitions. [2022-03-15 22:11:12,392 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 22:11:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 948 transitions. [2022-03-15 22:11:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:11:12,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:11:12,393 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:11:12,408 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 22:11:12,602 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 22:11:12,602 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:11:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:11:12,602 INFO L85 PathProgramCache]: Analyzing trace with hash -860490096, now seen corresponding path program 53 times [2022-03-15 22:11:12,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:11:12,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143318243] [2022-03-15 22:11:12,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:11:12,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:11:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:11:13,100 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 22:11:13,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:11:13,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143318243] [2022-03-15 22:11:13,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143318243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:11:13,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75532749] [2022-03-15 22:11:13,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:11:13,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:13,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:11:13,101 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 22:11:13,102 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 22:11:13,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 22:11:13,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:11:13,135 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:11:13,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:11:14,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:14,050 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 22:11:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:14,971 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 22:11:14,979 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 22:11:14,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:11:17,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:17,399 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 22:11:18,018 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:11:18,019 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 22:11:45,973 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 22:11:45,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75532749] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:11:45,973 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:11:45,973 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 22:11:45,973 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [578342831] [2022-03-15 22:11:45,973 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:11:45,976 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:11:45,986 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 22:11:45,986 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:11:46,306 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [56627#(and (or ok (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:11:46,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:11:46,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:11:46,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:11:46,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:11:46,307 INFO L87 Difference]: Start difference. First operand 388 states and 948 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 22:11:46,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:11:46,684 INFO L93 Difference]: Finished difference Result 916 states and 2239 transitions. [2022-03-15 22:11:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:11:46,685 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 22:11:46,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:11:46,686 INFO L225 Difference]: With dead ends: 916 [2022-03-15 22:11:46,686 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 22:11:46,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:11:46,687 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 106 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:11:46,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 1 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:11:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 22:11:46,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 376. [2022-03-15 22:11:46,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.453333333333333) internal successors, (920), 375 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:11:46,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 920 transitions. [2022-03-15 22:11:46,693 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 920 transitions. Word has length 32 [2022-03-15 22:11:46,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:11:46,693 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 920 transitions. [2022-03-15 22:11:46,693 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 22:11:46,693 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 920 transitions. [2022-03-15 22:11:46,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:11:46,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:11:46,693 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:11:46,711 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 22:11:46,894 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 22:11:46,894 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:11:46,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:11:46,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1135766752, now seen corresponding path program 54 times [2022-03-15 22:11:46,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:11:46,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604345544] [2022-03-15 22:11:46,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:11:46,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:11:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:11:47,389 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 22:11:47,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:11:47,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604345544] [2022-03-15 22:11:47,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604345544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:11:47,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471087070] [2022-03-15 22:11:47,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:11:47,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:11:47,390 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 22:11:47,391 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 22:11:47,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:11:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:11:47,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:11:47,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:11:49,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:49,088 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 22:11:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:59,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:59,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:59,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 62 treesize of output 138 [2022-03-15 22:12:03,926 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 22:12:03,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:12:40,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:40,978 INFO L353 Elim1Store]: treesize reduction 264, result has 56.1 percent of original size [2022-03-15 22:12:40,978 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 11 new quantified variables, introduced 65 case distinctions, treesize of input 115 treesize of output 393 [2022-03-15 22:12:41,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:41,096 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 396 treesize of output 432 [2022-03-15 22:13:40,492 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 22:13:40,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471087070] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:13:40,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:13:40,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 51 [2022-03-15 22:13:40,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [970672533] [2022-03-15 22:13:40,492 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:13:40,495 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:13:40,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:13:40,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:13:40,963 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [58539#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:13:40,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:13:40,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:13:40,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:13:40,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=2379, Unknown=8, NotChecked=0, Total=2862 [2022-03-15 22:13:40,964 INFO L87 Difference]: Start difference. First operand 376 states and 920 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 22:13:41,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:13:41,462 INFO L93 Difference]: Finished difference Result 832 states and 2021 transitions. [2022-03-15 22:13:41,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:13:41,462 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 22:13:41,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:13:41,464 INFO L225 Difference]: With dead ends: 832 [2022-03-15 22:13:41,464 INFO L226 Difference]: Without dead ends: 805 [2022-03-15 22:13:41,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=506, Invalid=2566, Unknown=8, NotChecked=0, Total=3080 [2022-03-15 22:13:41,464 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 80 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:13:41,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:13:41,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2022-03-15 22:13:41,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 338. [2022-03-15 22:13:41,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.462908011869436) internal successors, (830), 337 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:13:41,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 830 transitions. [2022-03-15 22:13:41,470 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 830 transitions. Word has length 32 [2022-03-15 22:13:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:13:41,470 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 830 transitions. [2022-03-15 22:13:41,470 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 22:13:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 830 transitions. [2022-03-15 22:13:41,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:13:41,470 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:13:41,470 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:13:41,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-15 22:13:41,671 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 22:13:41,671 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:13:41,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:13:41,671 INFO L85 PathProgramCache]: Analyzing trace with hash -311783632, now seen corresponding path program 55 times [2022-03-15 22:13:41,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:13:41,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272204993] [2022-03-15 22:13:41,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:13:41,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:13:41,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:42,161 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 22:13:42,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:13:42,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272204993] [2022-03-15 22:13:42,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272204993] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:13:42,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911023871] [2022-03-15 22:13:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:13:42,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:13:42,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:13:42,162 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 22:13:42,163 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 22:13:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:13:42,194 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:13:42,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:13:43,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:13:43,196 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 22:13:44,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:13:44,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,162 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:13:44,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:44,166 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 22:13:44,173 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 22:13:44,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:46,664 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:13:46,664 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 22:13:47,364 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:13:47,365 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 22:14:11,880 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:14:11,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911023871] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:14:11,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:14:11,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 44 [2022-03-15 22:14:11,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [44751422] [2022-03-15 22:14:11,881 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:14:11,883 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:14:11,894 INFO L252 McrAutomatonBuilder]: Finished intersection with 55 states and 76 transitions. [2022-03-15 22:14:11,894 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:14:12,535 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [60284#(and (or ok (not (< start end))) (or (<= (select queue (+ 2 start)) (select queue (+ 3 start))) (not (< start end))) (or (<= (select queue (+ 3 start)) (select queue (+ start 4))) (not (< start end))) (or (not (< start end)) (<= (select queue start) (select queue (+ start 1)))) (or (<= (select queue (+ start 1)) (select queue (+ 2 start))) (not (< start end))) (or (not (< start end)) (<= v_old (select queue start))))] [2022-03-15 22:14:12,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:14:12,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:14:12,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:14:12,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1830, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:14:12,536 INFO L87 Difference]: Start difference. First operand 338 states and 830 transitions. Second operand has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:14:13,026 INFO L93 Difference]: Finished difference Result 679 states and 1630 transitions. [2022-03-15 22:14:13,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:14:13,026 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:14:13,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:14:13,027 INFO L225 Difference]: With dead ends: 679 [2022-03-15 22:14:13,028 INFO L226 Difference]: Without dead ends: 648 [2022-03-15 22:14:13,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=354, Invalid=1998, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:14:13,028 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 140 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:14:13,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 1 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:14:13,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-03-15 22:14:13,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 320. [2022-03-15 22:14:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.4639498432601883) internal successors, (786), 319 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 786 transitions. [2022-03-15 22:14:13,033 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 786 transitions. Word has length 32 [2022-03-15 22:14:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:14:13,033 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 786 transitions. [2022-03-15 22:14:13,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:14:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 786 transitions. [2022-03-15 22:14:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:14:13,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:14:13,034 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:14:13,050 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 22:14:13,234 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 22:14:13,235 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:14:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:14:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1016020040, now seen corresponding path program 56 times [2022-03-15 22:14:13,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:14:13,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185118389] [2022-03-15 22:14:13,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:14:13,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:14:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:14:13,681 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 22:14:13,681 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:14:13,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185118389] [2022-03-15 22:14:13,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185118389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:14:13,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135829384] [2022-03-15 22:14:13,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:14:13,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:14:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:14:13,683 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 22:14:13,687 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 22:14:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:14:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:14:13,716 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:14:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:14:15,640 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:14:15,640 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 22:14:15,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:14:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:14:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:14:15,934 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 22:14:15,946 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 22:14:15,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:14:18,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:14:18,185 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 22:14:18,852 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:14:18,852 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 Received shutdown request... [2022-03-15 22:14:32,138 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 22:14:32,159 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 22:14:32,161 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:14:32,162 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 22:14:32,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-15 22:14:32,361 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 22:14:32,362 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 33 with TraceHistMax 6,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. [2022-03-15 22:14:32,363 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:14:32,363 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:14:32,364 INFO L732 BasicCegarLoop]: Path program histogram: [56, 1, 1] [2022-03-15 22:14:32,366 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:14:32,366 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:14:32,367 INFO L202 PluginConnector]: Adding new model inc-subseq.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:14:32 BasicIcfg [2022-03-15 22:14:32,367 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:14:32,367 INFO L158 Benchmark]: Toolchain (without parser) took 798658.47ms. Allocated memory was 188.7MB in the beginning and 327.2MB in the end (delta: 138.4MB). Free memory was 154.1MB in the beginning and 90.2MB in the end (delta: 63.9MB). Peak memory consumption was 216.3MB. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 188.7MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.51ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 INFO L158 Benchmark]: Boogie Preprocessor took 15.52ms. Allocated memory is still 188.7MB. Free memory was 152.6MB in the beginning and 151.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 INFO L158 Benchmark]: RCFGBuilder took 194.31ms. Allocated memory is still 188.7MB. Free memory was 151.5MB in the beginning and 142.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 INFO L158 Benchmark]: TraceAbstraction took 798416.79ms. Allocated memory was 188.7MB in the beginning and 327.2MB in the end (delta: 138.4MB). Free memory was 141.6MB in the beginning and 90.2MB in the end (delta: 51.5MB). Peak memory consumption was 204.8MB. Max. memory is 8.0GB. [2022-03-15 22:14:32,367 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 0.11ms. Allocated memory is still 188.7MB. Free memory is still 155.3MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 24.51ms. Allocated memory is still 188.7MB. Free memory was 154.1MB in the beginning and 152.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.52ms. Allocated memory is still 188.7MB. Free memory was 152.6MB in the beginning and 151.5MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 194.31ms. Allocated memory is still 188.7MB. Free memory was 151.5MB in the beginning and 142.1MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 798416.79ms. Allocated memory was 188.7MB in the beginning and 327.2MB in the end (delta: 138.4MB). Free memory was 141.6MB in the beginning and 90.2MB in the end (delta: 51.5MB). Peak memory consumption was 204.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.5s, 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 backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - 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 backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - 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 backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 9ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 798.4s, OverallIterations: 58, TraceHistogramMax: 6, PathProgramHistogramMax: 56, EmptinessCheckTime: 0.0s, AutomataDifference: 13.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.5s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3586 SdHoareTripleChecker+Valid, 10.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3586 mSDsluCounter, 51 SdHoareTripleChecker+Invalid, 8.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6116 mSDsCounter, 1312 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 19822 IncrementalHoareTripleChecker+Invalid, 21134 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1312 mSolverCounterUnsat, 1 mSDtfsCounter, 19822 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3858 GetRequests, 2000 SyntacticMatches, 100 SemanticMatches, 1758 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 21034 ImplicationChecksByTransitivity, 171.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=486occurred in iteration=50, InterpolantAutomatonStates: 816, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 57 MinimizatonAttempts, 11601 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 740.1s InterpolantComputationTime, 2676 NumberOfCodeBlocks, 2676 NumberOfCodeBlocksAsserted, 243 NumberOfCheckSat, 3820 ConstructedInterpolants, 1130 QuantifiedInterpolants, 113524 SizeOfPredicates, 942 NumberOfNonLiveVariables, 5684 ConjunctsInSsa, 2438 ConjunctsInUnsatCore, 164 InterpolantComputations, 4 PerfectInterpolantSequences, 778/6034 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