/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-array.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-c7b2d19 [2022-03-15 22:01:11,500 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-15 22:01:11,501 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-15 22:01:11,563 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-15 22:01:11,608 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-15 22:01:11,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-15 22:01:11,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-15 22:01:11,615 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 22:01:11,642 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-15 22:01:11,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-15 22:01:11,643 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-15 22:01:11,643 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-15 22:01:11,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Use SBE=true [2022-03-15 22:01:11,652 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-15 22:01:11,652 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-15 22:01:11,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-15 22:01:11,653 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:01:11,653 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2022-03-15 22:01:11,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-15 22:01:11,654 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-15 22:01:11,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-15 22:01:11,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-15 22:01:11,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-15 22:01:11,869 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-15 22:01:11,870 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-15 22:01:11,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl [2022-03-15 22:01:11,871 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/inc-subseq-array.wvr.bpl' [2022-03-15 22:01:11,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-15 22:01:11,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-15 22:01:11,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-15 22:01:11,889 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-15 22:01:11,889 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-15 22:01:11,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,902 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,906 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-15 22:01:11,908 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-15 22:01:11,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-15 22:01:11,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-15 22:01:11,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-15 22:01:11,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,916 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-15 22:01:11,923 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-15 22:01:11,923 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-15 22:01:11,924 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-15 22:01:11,925 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/1) ... [2022-03-15 22:01:11,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-15 22:01:11,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:11,945 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 22:01:11,962 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 22:01:11,985 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-15 22:01:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-15 22:01:11,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-15 22:01:11,986 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-15 22:01:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-15 22:01:11,986 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-15 22:01:11,986 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-15 22:01:11,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-15 22:01:11,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-15 22:01:11,987 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 22:01:12,032 INFO L234 CfgBuilder]: Building ICFG [2022-03-15 22:01:12,034 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-15 22:01:12,125 INFO L275 CfgBuilder]: Performing block encoding [2022-03-15 22:01:12,135 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-15 22:01:12,135 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-03-15 22:01:12,136 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:01:12 BoogieIcfgContainer [2022-03-15 22:01:12,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-15 22:01:12,137 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-15 22:01:12,138 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-15 22:01:12,140 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-15 22:01:12,140 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.03 10:01:11" (1/2) ... [2022-03-15 22:01:12,140 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23b94cb7 and model type inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.03 10:01:12, skipping insertion in model container [2022-03-15 22:01:12,141 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.03 10:01:12" (2/2) ... [2022-03-15 22:01:12,141 INFO L111 eAbstractionObserver]: Analyzing ICFG inc-subseq-array.wvr.bpl [2022-03-15 22:01:12,144 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-15 22:01:12,145 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-15 22:01:12,145 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-15 22:01:12,145 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-15 22:01:12,178 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-15 22:01:12,218 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-15 22:01:12,223 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 22:01:12,224 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-15 22:01:12,241 INFO L126 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-03-15 22:01:12,271 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:12,274 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:12,275 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 32 places, 28 transitions, 72 flow [2022-03-15 22:01:12,298 INFO L129 PetriNetUnfolder]: 3/26 cut-off events. [2022-03-15 22:01:12,299 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-03-15 22:01:12,301 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 22:01:12,305 INFO L116 LiptonReduction]: Number of co-enabled transitions 124 [2022-03-15 22:01:12,789 INFO L131 LiptonReduction]: Checked pairs total: 144 [2022-03-15 22:01:12,789 INFO L133 LiptonReduction]: Total number of compositions: 15 [2022-03-15 22:01:12,811 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 48 flow [2022-03-15 22:01:12,822 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 22:01:12,823 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 22:01:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-03-15 22:01:12,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:12,828 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:12,828 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:12,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:12,835 INFO L85 PathProgramCache]: Analyzing trace with hash -892536048, now seen corresponding path program 1 times [2022-03-15 22:01:12,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:12,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762390107] [2022-03-15 22:01:12,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:12,927 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 22:01:12,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:12,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762390107] [2022-03-15 22:01:12,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762390107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:12,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:12,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-03-15 22:01:12,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [211318101] [2022-03-15 22:01:12,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:12,931 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:12,939 INFO L252 McrAutomatonBuilder]: Finished intersection with 12 states and 14 transitions. [2022-03-15 22:01:12,939 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:13,055 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-15 22:01:13,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:13,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-15 22:01:13,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-15 22:01:13,072 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 22:01:13,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:13,100 INFO L93 Difference]: Finished difference Result 32 states and 66 transitions. [2022-03-15 22:01:13,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-15 22:01:13,102 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 22:01:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:13,110 INFO L225 Difference]: With dead ends: 32 [2022-03-15 22:01:13,110 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 22:01:13,111 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 22:01:13,114 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 22:01:13,114 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 22:01:13,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 22:01:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-03-15 22:01:13,135 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 22:01:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 47 transitions. [2022-03-15 22:01:13,136 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 47 transitions. Word has length 8 [2022-03-15 22:01:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:13,137 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 47 transitions. [2022-03-15 22:01:13,137 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 22:01:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 47 transitions. [2022-03-15 22:01:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-15 22:01:13,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:13,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:13,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-15 22:01:13,138 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:13,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1252850488, now seen corresponding path program 1 times [2022-03-15 22:01:13,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:13,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852181837] [2022-03-15 22:01:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:13,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:13,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:13,182 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 22:01:13,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:13,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852181837] [2022-03-15 22:01:13,183 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852181837] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:13,183 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:13,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-15 22:01:13,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [968019551] [2022-03-15 22:01:13,183 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:13,184 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:13,189 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2022-03-15 22:01:13,189 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:13,291 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [159#(or (= end start) (< i N)), 158#(< i N)] [2022-03-15 22:01:13,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:13,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:13,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:13,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:01:13,293 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 22:01:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:13,353 INFO L93 Difference]: Finished difference Result 32 states and 62 transitions. [2022-03-15 22:01:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:13,353 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 22:01:13,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:13,354 INFO L225 Difference]: With dead ends: 32 [2022-03-15 22:01:13,354 INFO L226 Difference]: Without dead ends: 27 [2022-03-15 22:01:13,355 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 22:01:13,356 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:13,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:01:13,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-15 22:01:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-03-15 22:01:13,363 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 22:01:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 54 transitions. [2022-03-15 22:01:13,367 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 54 transitions. Word has length 10 [2022-03-15 22:01:13,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:13,367 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 54 transitions. [2022-03-15 22:01:13,368 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 22:01:13,368 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 54 transitions. [2022-03-15 22:01:13,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-15 22:01:13,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:13,368 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:13,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-15 22:01:13,370 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:13,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:13,372 INFO L85 PathProgramCache]: Analyzing trace with hash -745074643, now seen corresponding path program 1 times [2022-03-15 22:01:13,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:13,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532118104] [2022-03-15 22:01:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:13,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:13,448 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 22:01:13,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:13,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532118104] [2022-03-15 22:01:13,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532118104] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:13,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590563420] [2022-03-15 22:01:13,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:13,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:13,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:13,469 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 22:01:13,473 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 22:01:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:13,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-15 22:01:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:13,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:01:13,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:01:13,681 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 22:01:13,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:13,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:13,749 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 22:01:13,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 22:01:13,830 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 22:01:13,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590563420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:13,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:13,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-03-15 22:01:13,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [172304306] [2022-03-15 22:01:13,831 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:13,832 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:13,833 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2022-03-15 22:01:13,833 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:13,938 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 22:01:13,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:13,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:13,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:01:13,940 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 22:01:14,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:14,008 INFO L93 Difference]: Finished difference Result 59 states and 117 transitions. [2022-03-15 22:01:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:01:14,008 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 22:01:14,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:14,011 INFO L225 Difference]: With dead ends: 59 [2022-03-15 22:01:14,012 INFO L226 Difference]: Without dead ends: 50 [2022-03-15 22:01:14,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:01:14,014 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 24 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:14,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 1 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-15 22:01:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-03-15 22:01:14,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2022-03-15 22:01:14,026 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 22:01:14,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 79 transitions. [2022-03-15 22:01:14,029 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 79 transitions. Word has length 12 [2022-03-15 22:01:14,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:14,029 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 79 transitions. [2022-03-15 22:01:14,029 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 22:01:14,029 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 79 transitions. [2022-03-15 22:01:14,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:01:14,030 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:14,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:14,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-15 22:01:14,235 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 22:01:14,237 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:14,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash 253259973, now seen corresponding path program 2 times [2022-03-15 22:01:14,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:14,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048454903] [2022-03-15 22:01:14,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:14,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:14,272 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 22:01:14,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:14,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048454903] [2022-03-15 22:01:14,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048454903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:14,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-15 22:01:14,273 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-15 22:01:14,273 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [407263578] [2022-03-15 22:01:14,273 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:14,274 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:14,276 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 22:01:14,276 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:14,309 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:14,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-15 22:01:14,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:14,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-15 22:01:14,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-15 22:01:14,310 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 22:01:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:14,348 INFO L93 Difference]: Finished difference Result 77 states and 154 transitions. [2022-03-15 22:01:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-15 22:01:14,348 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 22:01:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:14,351 INFO L225 Difference]: With dead ends: 77 [2022-03-15 22:01:14,351 INFO L226 Difference]: Without dead ends: 68 [2022-03-15 22:01:14,351 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 22:01:14,355 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 22:01:14,357 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 22:01:14,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-15 22:01:14,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2022-03-15 22:01:14,368 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 22:01:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 117 transitions. [2022-03-15 22:01:14,369 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 117 transitions. Word has length 14 [2022-03-15 22:01:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 117 transitions. [2022-03-15 22:01:14,369 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 22:01:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 117 transitions. [2022-03-15 22:01:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-15 22:01:14,370 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:14,370 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:14,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-15 22:01:14,370 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:14,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:14,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1911032220, now seen corresponding path program 3 times [2022-03-15 22:01:14,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:14,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121493229] [2022-03-15 22:01:14,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:14,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:14,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:14,428 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 22:01:14,429 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:14,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121493229] [2022-03-15 22:01:14,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121493229] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:14,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240080942] [2022-03-15 22:01:14,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:14,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:14,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:14,444 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 22:01:14,445 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 22:01:14,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-15 22:01:14,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:14,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-15 22:01:14,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:14,508 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 22:01:14,508 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-15 22:01:14,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240080942] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-15 22:01:14,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-15 22:01:14,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-03-15 22:01:14,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [301186558] [2022-03-15 22:01:14,508 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:14,510 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:14,512 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 26 transitions. [2022-03-15 22:01:14,512 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:14,578 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [686#(or (<= end start) (<= (+ 2 start) end))] [2022-03-15 22:01:14,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:14,579 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:14,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:14,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:01:14,580 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 22:01:14,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:14,642 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2022-03-15 22:01:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:14,643 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 22:01:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:14,643 INFO L225 Difference]: With dead ends: 79 [2022-03-15 22:01:14,644 INFO L226 Difference]: Without dead ends: 79 [2022-03-15 22:01:14,644 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 22:01:14,644 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 22:01:14,645 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 22:01:14,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-15 22:01:14,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2022-03-15 22:01:14,654 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 22:01:14,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 129 transitions. [2022-03-15 22:01:14,656 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 129 transitions. Word has length 14 [2022-03-15 22:01:14,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:14,656 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 129 transitions. [2022-03-15 22:01:14,657 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 22:01:14,657 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 129 transitions. [2022-03-15 22:01:14,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:14,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:14,658 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:14,681 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 22:01:14,874 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 22:01:14,875 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:14,875 INFO L85 PathProgramCache]: Analyzing trace with hash -289173252, now seen corresponding path program 4 times [2022-03-15 22:01:14,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:14,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570824011] [2022-03-15 22:01:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:14,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:15,020 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 22:01:15,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:15,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570824011] [2022-03-15 22:01:15,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570824011] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:15,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202656078] [2022-03-15 22:01:15,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:15,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:15,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:15,022 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 22:01:15,037 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 22:01:15,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:15,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:15,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:01:15,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:15,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:15,243 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 22:01:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:15,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:15,301 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 22:01:15,314 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 22:01:15,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:15,512 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:15,513 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 22:01:15,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:15,523 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 22:01:15,791 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 22:01:15,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202656078] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:15,791 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:15,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-03-15 22:01:15,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [386872146] [2022-03-15 22:01:15,791 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:15,793 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:15,795 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:01:15,795 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:15,912 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 22:01:15,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:01:15,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:01:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-03-15 22:01:15,913 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 22:01:16,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:16,026 INFO L93 Difference]: Finished difference Result 112 states and 229 transitions. [2022-03-15 22:01:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:01:16,026 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 22:01:16,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:16,027 INFO L225 Difference]: With dead ends: 112 [2022-03-15 22:01:16,027 INFO L226 Difference]: Without dead ends: 90 [2022-03-15 22:01:16,027 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 22:01:16,027 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 22:01:16,027 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 22:01:16,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-03-15 22:01:16,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 61. [2022-03-15 22:01:16,030 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 22:01:16,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 132 transitions. [2022-03-15 22:01:16,031 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 132 transitions. Word has length 16 [2022-03-15 22:01:16,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:16,031 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 132 transitions. [2022-03-15 22:01:16,031 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 22:01:16,031 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 132 transitions. [2022-03-15 22:01:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:16,031 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:16,031 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:16,050 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 22:01:16,235 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 22:01:16,236 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1827578112, now seen corresponding path program 5 times [2022-03-15 22:01:16,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:16,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037002458] [2022-03-15 22:01:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:16,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:16,335 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 22:01:16,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:16,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037002458] [2022-03-15 22:01:16,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037002458] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:16,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925518989] [2022-03-15 22:01:16,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:16,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:16,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:16,337 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 22:01:16,338 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 22:01:16,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-15 22:01:16,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:16,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-15 22:01:16,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:16,503 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 22:01:16,535 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:16,535 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 22:01:16,546 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 22:01:16,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:16,713 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:16,714 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 22:01:16,744 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:16,744 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 22:01:16,871 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 22:01:16,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925518989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:16,871 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:16,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-03-15 22:01:16,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [143992336] [2022-03-15 22:01:16,871 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:16,873 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:16,876 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2022-03-15 22:01:16,876 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:16,994 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 22:01:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:01:16,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:16,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:01:16,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-15 22:01:16,995 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 22:01:17,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:17,122 INFO L93 Difference]: Finished difference Result 112 states and 222 transitions. [2022-03-15 22:01:17,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:17,122 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 22:01:17,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:17,123 INFO L225 Difference]: With dead ends: 112 [2022-03-15 22:01:17,123 INFO L226 Difference]: Without dead ends: 87 [2022-03-15 22:01:17,123 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 22:01:17,124 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 22:01:17,124 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 22:01:17,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-15 22:01:17,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 46. [2022-03-15 22:01:17,138 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 22:01:17,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 98 transitions. [2022-03-15 22:01:17,138 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 98 transitions. Word has length 16 [2022-03-15 22:01:17,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:17,139 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 98 transitions. [2022-03-15 22:01:17,139 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 22:01:17,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 98 transitions. [2022-03-15 22:01:17,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:17,139 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:17,139 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:17,158 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 22:01:17,356 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 22:01:17,356 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:17,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 754492732, now seen corresponding path program 6 times [2022-03-15 22:01:17,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:17,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488811648] [2022-03-15 22:01:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:17,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:17,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:17,479 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 22:01:17,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:17,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488811648] [2022-03-15 22:01:17,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488811648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:17,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144053250] [2022-03-15 22:01:17,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:17,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:17,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:17,481 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 22:01:17,485 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 22:01:17,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:01:17,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-15 22:01:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:17,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:17,600 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 22:01:17,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:17,677 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 22:01:17,688 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 22:01:17,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:17,876 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:17,876 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 22:01:17,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:17,885 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 22:01:18,010 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 22:01:18,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144053250] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:18,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:18,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2022-03-15 22:01:18,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [963364242] [2022-03-15 22:01:18,011 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:18,013 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:18,015 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 28 transitions. [2022-03-15 22:01:18,015 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:18,093 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 22:01:18,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:01:18,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:18,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:01:18,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2022-03-15 22:01:18,094 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 22:01:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:18,188 INFO L93 Difference]: Finished difference Result 113 states and 240 transitions. [2022-03-15 22:01:18,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:18,189 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 22:01:18,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:18,190 INFO L225 Difference]: With dead ends: 113 [2022-03-15 22:01:18,190 INFO L226 Difference]: Without dead ends: 104 [2022-03-15 22:01:18,190 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 22:01:18,190 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 22:01:18,190 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 22:01:18,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-15 22:01:18,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 59. [2022-03-15 22:01:18,193 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 22:01:18,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 132 transitions. [2022-03-15 22:01:18,193 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 132 transitions. Word has length 16 [2022-03-15 22:01:18,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:18,193 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 132 transitions. [2022-03-15 22:01:18,194 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 22:01:18,194 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 132 transitions. [2022-03-15 22:01:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-15 22:01:18,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:18,194 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:18,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-15 22:01:18,407 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 22:01:18,408 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:18,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:18,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1753297468, now seen corresponding path program 7 times [2022-03-15 22:01:18,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:18,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107227076] [2022-03-15 22:01:18,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:18,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:18,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:18,507 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 22:01:18,508 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:18,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107227076] [2022-03-15 22:01:18,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107227076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:18,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32530534] [2022-03-15 22:01:18,508 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:18,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:18,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:18,509 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 22:01:18,509 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 22:01:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:18,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-15 22:01:18,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:18,619 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:18,619 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 22:01:18,696 INFO L353 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-03-15 22:01:18,696 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 22:01:18,702 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 22:01:18,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:18,861 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-03-15 22:01:18,861 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 22:01:18,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:18,869 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 22:01:19,017 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 22:01:19,018 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32530534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:19,018 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:19,018 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-15 22:01:19,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1545671795] [2022-03-15 22:01:19,018 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:19,026 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:19,029 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 36 transitions. [2022-03-15 22:01:19,029 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:19,150 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 22:01:19,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-15 22:01:19,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:19,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-15 22:01:19,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-03-15 22:01:19,152 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 22:01:19,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:19,270 INFO L93 Difference]: Finished difference Result 127 states and 275 transitions. [2022-03-15 22:01:19,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:19,270 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 22:01:19,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:19,271 INFO L225 Difference]: With dead ends: 127 [2022-03-15 22:01:19,271 INFO L226 Difference]: Without dead ends: 118 [2022-03-15 22:01:19,271 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 22:01:19,272 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 22:01:19,273 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 22:01:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-15 22:01:19,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 64. [2022-03-15 22:01:19,280 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 22:01:19,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 144 transitions. [2022-03-15 22:01:19,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 144 transitions. Word has length 16 [2022-03-15 22:01:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:19,281 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 144 transitions. [2022-03-15 22:01:19,281 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 22:01:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 144 transitions. [2022-03-15 22:01:19,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-15 22:01:19,282 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:19,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:19,302 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 22:01:19,496 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 22:01:19,496 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:19,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1771504108, now seen corresponding path program 8 times [2022-03-15 22:01:19,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:19,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814939502] [2022-03-15 22:01:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:19,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:19,542 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 22:01:19,542 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:19,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814939502] [2022-03-15 22:01:19,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814939502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:19,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277043977] [2022-03-15 22:01:19,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:19,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:19,544 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 22:01:19,544 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 22:01:19,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:19,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-15 22:01:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:19,592 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 22:01:19,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:19,617 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 22:01:19,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277043977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:19,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:19,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-03-15 22:01:19,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [588362247] [2022-03-15 22:01:19,617 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:19,619 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:19,621 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 30 transitions. [2022-03-15 22:01:19,622 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:19,641 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:19,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-15 22:01:19,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:19,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-15 22:01:19,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-15 22:01:19,642 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 22:01:19,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:19,680 INFO L93 Difference]: Finished difference Result 133 states and 275 transitions. [2022-03-15 22:01:19,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-15 22:01:19,681 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 22:01:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:19,681 INFO L225 Difference]: With dead ends: 133 [2022-03-15 22:01:19,681 INFO L226 Difference]: Without dead ends: 120 [2022-03-15 22:01:19,682 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 22:01:19,682 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 22:01:19,683 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 22:01:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-03-15 22:01:19,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 98. [2022-03-15 22:01:19,688 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 22:01:19,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 223 transitions. [2022-03-15 22:01:19,689 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 223 transitions. Word has length 18 [2022-03-15 22:01:19,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:19,690 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 223 transitions. [2022-03-15 22:01:19,690 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 22:01:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 223 transitions. [2022-03-15 22:01:19,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:19,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:19,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:19,711 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 22:01:19,907 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 22:01:19,907 INFO L402 AbstractCegarLoop]: === Iteration 11 === 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 -381016437, now seen corresponding path program 9 times [2022-03-15 22:01:19,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:19,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036108366] [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 22:01:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:20,056 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 22:01:20,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:20,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036108366] [2022-03-15 22:01:20,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036108366] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:20,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005800174] [2022-03-15 22:01:20,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:20,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:20,058 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 22:01:20,085 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 22:01:20,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:01:20,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:20,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 34 conjunts are in the unsatisfiable core [2022-03-15 22:01:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:20,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:20,321 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 22:01:20,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:20,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:20,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:20,536 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 22:01:20,850 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 22:01:20,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:22,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:22,488 INFO L353 Elim1Store]: treesize reduction 24, result has 75.3 percent of original size [2022-03-15 22:01:22,489 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 22:01:22,507 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:22,508 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 22:01:23,254 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 22:01:23,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005800174] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:23,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:23,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 23 [2022-03-15 22:01:23,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [532909361] [2022-03-15 22:01:23,256 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:23,257 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:23,260 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:23,260 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:23,353 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 22:01:23,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:23,353 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:23,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:23,354 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 22:01:23,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:23,486 INFO L93 Difference]: Finished difference Result 161 states and 352 transitions. [2022-03-15 22:01:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:01:23,486 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 22:01:23,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:23,487 INFO L225 Difference]: With dead ends: 161 [2022-03-15 22:01:23,487 INFO L226 Difference]: Without dead ends: 146 [2022-03-15 22:01:23,487 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 22:01:23,488 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 22:01:23,488 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 22:01:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-15 22:01:23,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2022-03-15 22:01:23,490 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 22:01:23,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 227 transitions. [2022-03-15 22:01:23,491 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 227 transitions. Word has length 20 [2022-03-15 22:01:23,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:23,491 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 227 transitions. [2022-03-15 22:01:23,491 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 22:01:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 227 transitions. [2022-03-15 22:01:23,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:23,492 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:23,492 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:23,511 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 22:01:23,707 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 22:01:23,707 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1406160659, now seen corresponding path program 10 times [2022-03-15 22:01:23,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:23,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560961745] [2022-03-15 22:01:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:23,884 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 22:01:23,884 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:23,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560961745] [2022-03-15 22:01:23,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560961745] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:23,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374092144] [2022-03-15 22:01:23,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:23,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:23,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:23,886 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 22:01:23,887 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 22:01:23,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:23,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:23,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:24,140 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:24,140 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 22:01:24,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:24,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:24,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:24,358 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:24,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:24,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:24,360 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 22:01:24,367 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 22:01:24,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:24,803 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:24,803 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 22:01:24,818 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:24,819 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 22:01:25,657 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 22:01:25,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374092144] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:25,658 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:25,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-03-15 22:01:25,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [865290832] [2022-03-15 22:01:25,658 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:25,660 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:25,663 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:25,663 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:25,798 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 22:01:25,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:25,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:25,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:25,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:01:25,799 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 22:01:25,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:25,948 INFO L93 Difference]: Finished difference Result 201 states and 445 transitions. [2022-03-15 22:01:25,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:25,948 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 22:01:25,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:25,949 INFO L225 Difference]: With dead ends: 201 [2022-03-15 22:01:25,949 INFO L226 Difference]: Without dead ends: 182 [2022-03-15 22:01:25,949 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 22:01:25,950 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 22:01:25,950 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 22:01:25,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-15 22:01:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 94. [2022-03-15 22:01:25,953 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 22:01:25,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 213 transitions. [2022-03-15 22:01:25,954 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 213 transitions. Word has length 20 [2022-03-15 22:01:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:25,954 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 213 transitions. [2022-03-15 22:01:25,954 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 22:01:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 213 transitions. [2022-03-15 22:01:25,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:25,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:25,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:25,973 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 22:01:26,163 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 22:01:26,163 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash -467270005, now seen corresponding path program 11 times [2022-03-15 22:01:26,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:26,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815895139] [2022-03-15 22:01:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:26,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:26,303 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 22:01:26,304 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:26,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815895139] [2022-03-15 22:01:26,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815895139] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:26,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758969063] [2022-03-15 22:01:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:26,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:26,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:26,305 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 22:01:26,306 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 22:01:26,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:01:26,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:01:26,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:26,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:26,643 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 22:01:26,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:26,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:26,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:26,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:26,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:26,701 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 22:01:26,712 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 22:01:26,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:27,147 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:27,148 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 22:01:27,215 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:27,215 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 22:01:27,685 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 22:01:27,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758969063] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:27,685 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:27,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 22:01:27,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [914798005] [2022-03-15 22:01:27,686 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:27,688 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:27,691 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:27,691 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:27,786 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 22:01:27,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:27,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:01:27,787 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 22:01:27,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:27,925 INFO L93 Difference]: Finished difference Result 165 states and 350 transitions. [2022-03-15 22:01:27,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:27,926 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 22:01:27,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:27,926 INFO L225 Difference]: With dead ends: 165 [2022-03-15 22:01:27,926 INFO L226 Difference]: Without dead ends: 140 [2022-03-15 22:01:27,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:27,927 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 22:01:27,927 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 22:01:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-03-15 22:01:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 101. [2022-03-15 22:01:27,929 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 22:01:27,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 229 transitions. [2022-03-15 22:01:27,930 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 229 transitions. Word has length 20 [2022-03-15 22:01:27,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:27,930 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 229 transitions. [2022-03-15 22:01:27,930 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 22:01:27,930 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 229 transitions. [2022-03-15 22:01:27,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:27,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:27,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:27,946 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 22:01:28,146 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 22:01:28,147 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:28,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1931394221, now seen corresponding path program 12 times [2022-03-15 22:01:28,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:28,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563315386] [2022-03-15 22:01:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:28,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:28,293 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 22:01:28,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:28,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563315386] [2022-03-15 22:01:28,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563315386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:28,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013188678] [2022-03-15 22:01:28,293 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:28,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:28,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:28,294 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 22:01:28,295 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 22:01:28,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-15 22:01:28,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:01:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:28,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:28,569 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 22:01:28,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:28,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:28,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:28,750 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 22:01:28,873 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 22:01:28,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:29,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:29,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:29,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:29,565 INFO L353 Elim1Store]: treesize reduction 14, result has 79.7 percent of original size [2022-03-15 22:01:29,565 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 22:01:29,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:29,581 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 22:01:30,476 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 22:01:30,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013188678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:30,477 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:30,477 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 25 [2022-03-15 22:01:30,477 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [24657855] [2022-03-15 22:01:30,477 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:30,478 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:30,482 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:30,482 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:30,617 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 22:01:30,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-15 22:01:30,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:30,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-15 22:01:30,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-15 22:01:30,618 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 22:01:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:30,743 INFO L93 Difference]: Finished difference Result 262 states and 593 transitions. [2022-03-15 22:01:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:30,743 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 22:01:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:30,744 INFO L225 Difference]: With dead ends: 262 [2022-03-15 22:01:30,744 INFO L226 Difference]: Without dead ends: 243 [2022-03-15 22:01:30,745 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 22:01:30,745 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 22:01:30,745 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 22:01:30,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-03-15 22:01:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 111. [2022-03-15 22:01:30,750 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 22:01:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 253 transitions. [2022-03-15 22:01:30,750 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 253 transitions. Word has length 20 [2022-03-15 22:01:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:30,752 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 253 transitions. [2022-03-15 22:01:30,752 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 22:01:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 253 transitions. [2022-03-15 22:01:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:30,752 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:30,752 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:30,770 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 22:01:30,962 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 22:01:30,962 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:30,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1040041521, now seen corresponding path program 13 times [2022-03-15 22:01:30,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:30,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346020942] [2022-03-15 22:01:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:30,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:31,120 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 22:01:31,120 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:31,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346020942] [2022-03-15 22:01:31,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346020942] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:31,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81777526] [2022-03-15 22:01:31,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:31,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:31,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:31,122 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 22:01:31,122 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 22:01:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:31,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:31,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:31,389 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 22:01:31,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:31,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:31,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:31,539 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 22:01:31,550 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 22:01:31,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:31,951 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:31,952 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 22:01:31,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:31,971 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 22:01:32,364 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 22:01:32,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81777526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:32,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:32,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 22 [2022-03-15 22:01:32,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1440369650] [2022-03-15 22:01:32,365 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:32,366 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:32,369 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:01:32,370 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:32,501 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 22:01:32,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:32,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-03-15 22:01:32,502 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 22:01:32,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:32,648 INFO L93 Difference]: Finished difference Result 237 states and 529 transitions. [2022-03-15 22:01:32,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-15 22:01:32,648 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 22:01:32,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:32,649 INFO L225 Difference]: With dead ends: 237 [2022-03-15 22:01:32,649 INFO L226 Difference]: Without dead ends: 218 [2022-03-15 22:01:32,650 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 22:01:32,650 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 22:01:32,650 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 22:01:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-15 22:01:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 122. [2022-03-15 22:01:32,653 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 22:01:32,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 281 transitions. [2022-03-15 22:01:32,653 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 281 transitions. Word has length 20 [2022-03-15 22:01:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:32,653 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 281 transitions. [2022-03-15 22:01:32,653 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 22:01:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 281 transitions. [2022-03-15 22:01:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:32,654 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:32,654 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:32,677 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 22:01:32,859 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 22:01:32,859 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:32,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:32,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1305244897, now seen corresponding path program 14 times [2022-03-15 22:01:32,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:32,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196251042] [2022-03-15 22:01:32,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:32,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:33,001 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 22:01:33,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:33,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196251042] [2022-03-15 22:01:33,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196251042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:33,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489837721] [2022-03-15 22:01:33,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:33,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:33,003 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 22:01:33,019 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 22:01:33,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:33,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:33,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:33,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:33,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:33,343 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 22:01:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:33,426 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:33,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 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 22:01:33,436 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 22:01:33,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:33,865 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:33,866 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 22:01:33,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:33,886 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 22:01:34,728 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 22:01:34,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489837721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:34,728 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:34,728 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 21 [2022-03-15 22:01:34,729 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [802015043] [2022-03-15 22:01:34,729 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:34,730 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:34,733 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2022-03-15 22:01:34,733 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:34,855 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 22:01:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:34,856 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:34,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:01:34,856 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 22:01:35,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:35,031 INFO L93 Difference]: Finished difference Result 284 states and 626 transitions. [2022-03-15 22:01:35,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-15 22:01:35,031 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 22:01:35,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:35,032 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:01:35,032 INFO L226 Difference]: Without dead ends: 248 [2022-03-15 22:01:35,032 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 22:01:35,033 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 22:01:35,033 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 22:01:35,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-15 22:01:35,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 140. [2022-03-15 22:01:35,036 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 22:01:35,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 324 transitions. [2022-03-15 22:01:35,036 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 324 transitions. Word has length 20 [2022-03-15 22:01:35,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:35,036 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 324 transitions. [2022-03-15 22:01:35,036 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 22:01:35,036 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 324 transitions. [2022-03-15 22:01:35,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:35,037 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:35,037 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:35,056 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 22:01:35,243 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 22:01:35,243 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1482940661, now seen corresponding path program 15 times [2022-03-15 22:01:35,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:35,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535953236] [2022-03-15 22:01:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:35,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:35,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:35,416 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 22:01:35,416 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:35,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535953236] [2022-03-15 22:01:35,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535953236] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:35,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889375376] [2022-03-15 22:01:35,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:35,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:35,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:35,417 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 22:01:35,445 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 22:01:35,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-15 22:01:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-15 22:01:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:35,631 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:35,632 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 22:01:35,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:35,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:35,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:35,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:35,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:35,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:35,863 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 22:01:36,156 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 22:01:36,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:36,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:36,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:36,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:36,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:36,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:36,767 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 22:01:36,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:36,780 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 22:01:36,995 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 22:01:36,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889375376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:36,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:36,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2022-03-15 22:01:36,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [930482806] [2022-03-15 22:01:36,996 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:36,997 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:37,000 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 32 transitions. [2022-03-15 22:01:37,000 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:37,096 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 22:01:37,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-15 22:01:37,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:37,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-15 22:01:37,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=634, Unknown=0, NotChecked=0, Total=812 [2022-03-15 22:01:37,097 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 22:01:37,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:37,263 INFO L93 Difference]: Finished difference Result 306 states and 711 transitions. [2022-03-15 22:01:37,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:37,263 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 22:01:37,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:37,264 INFO L225 Difference]: With dead ends: 306 [2022-03-15 22:01:37,264 INFO L226 Difference]: Without dead ends: 297 [2022-03-15 22:01:37,265 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 22:01:37,265 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 22:01:37,265 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 22:01:37,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-15 22:01:37,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 161. [2022-03-15 22:01:37,270 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 22:01:37,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 376 transitions. [2022-03-15 22:01:37,270 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 376 transitions. Word has length 20 [2022-03-15 22:01:37,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:37,270 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 376 transitions. [2022-03-15 22:01:37,270 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 22:01:37,270 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 376 transitions. [2022-03-15 22:01:37,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:37,271 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:37,271 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:37,286 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 22:01:37,486 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 22:01:37,487 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:37,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:37,487 INFO L85 PathProgramCache]: Analyzing trace with hash 304236435, now seen corresponding path program 16 times [2022-03-15 22:01:37,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:37,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665672322] [2022-03-15 22:01:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:37,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:37,656 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 22:01:37,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:37,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665672322] [2022-03-15 22:01:37,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665672322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:37,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578440141] [2022-03-15 22:01:37,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:37,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:37,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:37,657 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 22:01:37,665 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 22:01:37,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-15 22:01:37,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:37,855 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:37,855 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 22:01:38,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:38,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:38,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:38,072 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 22:01:38,078 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 22:01:38,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:38,487 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:38,487 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 22:01:38,502 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:38,502 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 22:01:39,405 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 22:01:39,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578440141] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:39,405 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:39,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2022-03-15 22:01:39,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [851870717] [2022-03-15 22:01:39,406 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:39,407 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:39,410 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 40 transitions. [2022-03-15 22:01:39,410 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:39,539 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 22:01:39,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:39,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-03-15 22:01:39,540 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 22:01:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:39,686 INFO L93 Difference]: Finished difference Result 317 states and 734 transitions. [2022-03-15 22:01:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:01:39,687 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 22:01:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:39,688 INFO L225 Difference]: With dead ends: 317 [2022-03-15 22:01:39,689 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 22:01:39,689 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 22:01:39,689 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 22:01:39,690 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 22:01:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 22:01:39,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 159. [2022-03-15 22:01:39,693 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 22:01:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 374 transitions. [2022-03-15 22:01:39,694 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 374 transitions. Word has length 20 [2022-03-15 22:01:39,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:39,694 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 374 transitions. [2022-03-15 22:01:39,694 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 22:01:39,694 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 374 transitions. [2022-03-15 22:01:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-15 22:01:39,695 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:39,695 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:39,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-15 22:01:39,905 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 22:01:39,905 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1016589853, now seen corresponding path program 17 times [2022-03-15 22:01:39,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:39,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506528851] [2022-03-15 22:01:39,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:40,086 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 22:01:40,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:40,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506528851] [2022-03-15 22:01:40,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506528851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:40,087 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443653970] [2022-03-15 22:01:40,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:01:40,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:40,111 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 22:01:40,180 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 22:01:40,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-15 22:01:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-15 22:01:40,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:40,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:40,374 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 22:01:40,524 INFO L353 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2022-03-15 22:01:40,524 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 22:01:40,532 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 22:01:40,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:40,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:40,865 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 22:01:40,946 INFO L353 Elim1Store]: treesize reduction 76, result has 52.8 percent of original size [2022-03-15 22:01:40,947 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 22:01:41,347 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 22:01:41,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443653970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:41,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:41,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-03-15 22:01:41,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1934970263] [2022-03-15 22:01:41,348 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:41,349 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:41,353 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 48 transitions. [2022-03-15 22:01:41,353 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:41,606 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 22:01:41,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:41,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:41,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:41,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-03-15 22:01:41,607 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 22:01:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:41,763 INFO L93 Difference]: Finished difference Result 327 states and 758 transitions. [2022-03-15 22:01:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:01:41,764 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 22:01:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:41,771 INFO L225 Difference]: With dead ends: 327 [2022-03-15 22:01:41,772 INFO L226 Difference]: Without dead ends: 318 [2022-03-15 22:01:41,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-03-15 22:01:41,772 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 22:01:41,772 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 22:01:41,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-15 22:01:41,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 164. [2022-03-15 22:01:41,776 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 22:01:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 386 transitions. [2022-03-15 22:01:41,778 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 386 transitions. Word has length 20 [2022-03-15 22:01:41,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:41,778 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 386 transitions. [2022-03-15 22:01:41,778 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 22:01:41,778 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 386 transitions. [2022-03-15 22:01:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-15 22:01:41,778 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:41,779 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:41,796 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 22:01:41,997 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 22:01:41,997 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:41,997 INFO L85 PathProgramCache]: Analyzing trace with hash -166379485, now seen corresponding path program 18 times [2022-03-15 22:01:42,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:42,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360804078] [2022-03-15 22:01:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:42,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:42,035 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 22:01:42,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:42,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360804078] [2022-03-15 22:01:42,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360804078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:42,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286326407] [2022-03-15 22:01:42,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:01:42,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:42,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:42,037 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 22:01:42,038 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 22:01:42,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:01:42,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:42,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-15 22:01:42,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:42,104 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 22:01:42,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:42,136 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 22:01:42,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286326407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:42,137 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:42,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-03-15 22:01:42,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2078920862] [2022-03-15 22:01:42,137 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:42,139 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:42,142 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 34 transitions. [2022-03-15 22:01:42,142 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:42,162 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:01:42,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-15 22:01:42,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-15 22:01:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-03-15 22:01:42,162 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 22:01:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:42,233 INFO L93 Difference]: Finished difference Result 283 states and 632 transitions. [2022-03-15 22:01:42,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-15 22:01:42,234 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 22:01:42,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:42,235 INFO L225 Difference]: With dead ends: 283 [2022-03-15 22:01:42,235 INFO L226 Difference]: Without dead ends: 266 [2022-03-15 22:01:42,235 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 22:01:42,235 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:01:42,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:01:42,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-03-15 22:01:42,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 214. [2022-03-15 22:01:42,247 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 22:01:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2022-03-15 22:01:42,247 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 22 [2022-03-15 22:01:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:42,247 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2022-03-15 22:01:42,248 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 22:01:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2022-03-15 22:01:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:42,248 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:42,248 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:42,267 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 22:01:42,449 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 22:01:42,450 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:42,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:42,450 INFO L85 PathProgramCache]: Analyzing trace with hash -689732318, now seen corresponding path program 19 times [2022-03-15 22:01:42,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:42,451 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877026925] [2022-03-15 22:01:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:42,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:42,635 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 22:01:42,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:42,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877026925] [2022-03-15 22:01:42,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877026925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:42,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896037065] [2022-03-15 22:01:42,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:01:42,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:42,637 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 22:01:42,638 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 22:01:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:42,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:43,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:43,108 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 22:01:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:43,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:43,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:43,338 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 22:01:43,345 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 22:01:43,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:44,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:44,053 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 22:01:44,194 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:01:44,195 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 22:01:46,051 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 22:01:46,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896037065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:46,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:46,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 27 [2022-03-15 22:01:46,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [351015522] [2022-03-15 22:01:46,052 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:46,054 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:46,059 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:01:46,059 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:46,201 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 22:01:46,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:01:46,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:46,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:01:46,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2022-03-15 22:01:46,202 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 22:01:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:46,368 INFO L93 Difference]: Finished difference Result 523 states and 1246 transitions. [2022-03-15 22:01:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:01:46,369 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 22:01:46,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:46,370 INFO L225 Difference]: With dead ends: 523 [2022-03-15 22:01:46,371 INFO L226 Difference]: Without dead ends: 504 [2022-03-15 22:01:46,371 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 22:01:46,371 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 22:01:46,371 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 22:01:46,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-03-15 22:01:46,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 192. [2022-03-15 22:01:46,375 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 22:01:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 460 transitions. [2022-03-15 22:01:46,376 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 460 transitions. Word has length 24 [2022-03-15 22:01:46,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:46,376 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 460 transitions. [2022-03-15 22:01:46,376 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 22:01:46,376 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 460 transitions. [2022-03-15 22:01:46,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:46,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:46,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:46,400 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 22:01:46,598 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 22:01:46,598 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash 201620382, now seen corresponding path program 20 times [2022-03-15 22:01:46,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:46,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849581456] [2022-03-15 22:01:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:46,786 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 22:01:46,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:46,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849581456] [2022-03-15 22:01:46,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849581456] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:46,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552004249] [2022-03-15 22:01:46,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:01:46,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:46,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:46,787 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 22:01:46,788 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 22:01:46,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:01:46,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:46,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:46,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:47,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:47,217 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 22:01:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:47,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:47,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:47,417 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 22:01:47,428 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 22:01:47,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:48,131 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:48,132 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 22:01:48,289 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:01:48,290 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 22:01:50,242 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 22:01:50,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552004249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:50,242 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:50,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-03-15 22:01:50,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1732940291] [2022-03-15 22:01:50,243 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:50,244 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:50,249 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:01:50,249 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:50,379 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 22:01:50,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:01:50,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:50,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:01:50,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2022-03-15 22:01:50,380 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 22:01:50,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:50,580 INFO L93 Difference]: Finished difference Result 301 states and 675 transitions. [2022-03-15 22:01:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:01:50,580 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 22:01:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:50,581 INFO L225 Difference]: With dead ends: 301 [2022-03-15 22:01:50,581 INFO L226 Difference]: Without dead ends: 267 [2022-03-15 22:01:50,581 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 22:01:50,582 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 22:01:50,582 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 22:01:50,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-15 22:01:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 182. [2022-03-15 22:01:50,585 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 22:01:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 432 transitions. [2022-03-15 22:01:50,585 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 432 transitions. Word has length 24 [2022-03-15 22:01:50,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:50,585 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 432 transitions. [2022-03-15 22:01:50,585 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 22:01:50,585 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 432 transitions. [2022-03-15 22:01:50,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:50,586 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:50,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:50,605 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 22:01:50,800 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 22:01:50,800 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -241278758, now seen corresponding path program 21 times [2022-03-15 22:01:50,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:50,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812832635] [2022-03-15 22:01:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:50,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:50,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:51,015 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 22:01:51,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:51,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812832635] [2022-03-15 22:01:51,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812832635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:51,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597559394] [2022-03-15 22:01:51,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:01:51,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:51,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:51,017 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 22:01:51,017 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 22:01:51,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-03-15 22:01:51,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:51,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:01:51,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:01:51,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:51,432 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 56 treesize of output 84 [2022-03-15 22:01:51,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:51,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:51,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:51,880 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 22:01:53,724 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 22:01:53,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:01:56,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:56,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:01:56,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:01:56,488 INFO L353 Elim1Store]: treesize reduction 32, result has 77.3 percent of original size [2022-03-15 22:01:56,489 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 22:01:56,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:01:56,518 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 22:01:58,919 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 22:01:58,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597559394] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:01:58,919 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:01:58,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-03-15 22:01:58,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2137930884] [2022-03-15 22:01:58,920 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:01:58,921 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:01:58,926 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:01:58,926 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:01:59,035 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 22:01:59,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:01:59,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:01:59,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:01:59,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=973, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:01:59,036 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 22:01:59,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:01:59,252 INFO L93 Difference]: Finished difference Result 310 states and 723 transitions. [2022-03-15 22:01:59,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:01:59,252 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 22:01:59,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:01:59,253 INFO L225 Difference]: With dead ends: 310 [2022-03-15 22:01:59,253 INFO L226 Difference]: Without dead ends: 293 [2022-03-15 22:01:59,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=1078, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:01:59,254 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 22:01:59,254 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 22:01:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-03-15 22:01:59,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 192. [2022-03-15 22:01:59,258 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 22:01:59,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 454 transitions. [2022-03-15 22:01:59,258 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 454 transitions. Word has length 24 [2022-03-15 22:01:59,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:01:59,258 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 454 transitions. [2022-03-15 22:01:59,258 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 22:01:59,258 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 454 transitions. [2022-03-15 22:01:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:01:59,259 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:01:59,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:01:59,277 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 22:01:59,475 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 22:01:59,475 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:01:59,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:01:59,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1545898338, now seen corresponding path program 22 times [2022-03-15 22:01:59,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:01:59,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879944501] [2022-03-15 22:01:59,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:01:59,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:01:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:01:59,703 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 22:01:59,704 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:01:59,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879944501] [2022-03-15 22:01:59,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879944501] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:01:59,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054221074] [2022-03-15 22:01:59,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:01:59,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:01:59,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:01:59,705 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 22:01:59,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-15 22:01:59,734 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:01:59,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:01:59,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:01:59,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:00,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:00,084 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 22:02:00,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:00,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:00,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:00,396 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 22:02:00,404 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 22:02:00,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:01,208 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:01,208 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 22:02:01,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:01,243 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 22:02:05,306 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 22:02:05,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054221074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:05,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:05,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 29 [2022-03-15 22:02:05,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [801843784] [2022-03-15 22:02:05,306 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:05,308 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:05,313 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:02:05,313 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:05,451 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 22:02:05,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:05,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:05,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:05,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-03-15 22:02:05,452 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 22:02:05,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:05,647 INFO L93 Difference]: Finished difference Result 368 states and 855 transitions. [2022-03-15 22:02:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:05,648 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 22:02:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:05,649 INFO L225 Difference]: With dead ends: 368 [2022-03-15 22:02:05,649 INFO L226 Difference]: Without dead ends: 349 [2022-03-15 22:02:05,649 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 22:02:05,650 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 22:02:05,650 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 22:02:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-03-15 22:02:05,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 166. [2022-03-15 22:02:05,654 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 22:02:05,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 394 transitions. [2022-03-15 22:02:05,654 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 394 transitions. Word has length 24 [2022-03-15 22:02:05,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:05,654 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 394 transitions. [2022-03-15 22:02:05,654 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 22:02:05,654 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 394 transitions. [2022-03-15 22:02:05,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:05,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:05,655 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:05,675 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 22:02:05,871 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 22:02:05,871 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:05,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:05,871 INFO L85 PathProgramCache]: Analyzing trace with hash 225072050, now seen corresponding path program 23 times [2022-03-15 22:02:05,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:05,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025700534] [2022-03-15 22:02:05,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:05,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:06,105 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 22:02:06,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:06,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025700534] [2022-03-15 22:02:06,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025700534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:06,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364517837] [2022-03-15 22:02:06,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:02:06,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:06,106 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 22:02:06,107 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 22:02:06,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:02:06,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:06,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:02:06,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:06,498 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:06,499 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 22:02:06,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:06,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:06,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:06,804 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 22:02:06,810 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 22:02:06,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:07,622 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:07,622 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 22:02:07,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:07,649 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 22:02:11,086 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 22:02:11,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364517837] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:11,086 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:11,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2022-03-15 22:02:11,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [684817267] [2022-03-15 22:02:11,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:11,088 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:11,094 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:11,094 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:11,339 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 22:02:11,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:11,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:11,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:11,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:11,339 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 22:02:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:11,556 INFO L93 Difference]: Finished difference Result 331 states and 764 transitions. [2022-03-15 22:02:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:11,556 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 22:02:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:11,557 INFO L225 Difference]: With dead ends: 331 [2022-03-15 22:02:11,557 INFO L226 Difference]: Without dead ends: 308 [2022-03-15 22:02:11,558 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 22:02:11,558 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, 0.2s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:11,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 1 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-15 22:02:11,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-15 22:02:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 156. [2022-03-15 22:02:11,561 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 22:02:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 370 transitions. [2022-03-15 22:02:11,562 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 370 transitions. Word has length 24 [2022-03-15 22:02:11,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:11,562 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 370 transitions. [2022-03-15 22:02:11,562 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 22:02:11,562 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 370 transitions. [2022-03-15 22:02:11,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:11,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:11,563 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:11,580 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 22:02:11,763 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 22:02:11,763 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:11,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 164233434, now seen corresponding path program 24 times [2022-03-15 22:02:11,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:11,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573345885] [2022-03-15 22:02:11,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:11,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:11,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:11,968 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 22:02:11,968 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:11,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573345885] [2022-03-15 22:02:11,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573345885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:11,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463400376] [2022-03-15 22:02:11,968 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:02:11,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:11,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:11,969 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 22:02:11,970 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 22:02:11,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:02:11,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:11,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:13,425 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:13,426 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 22:02:13,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:13,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:13,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:13,930 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 22:02:14,429 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 22:02:14,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:17,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:17,335 INFO L353 Elim1Store]: treesize reduction 76, result has 65.0 percent of original size [2022-03-15 22:02:17,335 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 22:02:17,366 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:17,366 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 22:02:18,125 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 22:02:18,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463400376] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:18,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:18,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 31 [2022-03-15 22:02:18,126 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [167297595] [2022-03-15 22:02:18,126 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:18,128 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:18,132 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:02:18,132 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:18,225 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 22:02:18,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-15 22:02:18,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-15 22:02:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=915, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:02:18,226 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 22:02:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:18,429 INFO L93 Difference]: Finished difference Result 284 states and 638 transitions. [2022-03-15 22:02:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:02:18,429 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 22:02:18,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:18,430 INFO L225 Difference]: With dead ends: 284 [2022-03-15 22:02:18,430 INFO L226 Difference]: Without dead ends: 244 [2022-03-15 22:02:18,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=239, Invalid=1021, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:02:18,431 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 22:02:18,431 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 22:02:18,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-03-15 22:02:18,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 171. [2022-03-15 22:02:18,434 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 22:02:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 406 transitions. [2022-03-15 22:02:18,434 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 406 transitions. Word has length 24 [2022-03-15 22:02:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:18,434 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 406 transitions. [2022-03-15 22:02:18,434 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 22:02:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 406 transitions. [2022-03-15 22:02:18,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:18,435 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:18,435 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:18,455 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 22:02:18,655 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 22:02:18,656 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:18,656 INFO L85 PathProgramCache]: Analyzing trace with hash -385086414, now seen corresponding path program 25 times [2022-03-15 22:02:18,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:18,657 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114837788] [2022-03-15 22:02:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:18,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:18,864 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 22:02:18,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:18,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114837788] [2022-03-15 22:02:18,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114837788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:18,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239138082] [2022-03-15 22:02:18,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:18,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:18,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:18,866 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 22:02:18,866 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 22:02:18,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:18,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:18,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:19,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:19,292 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 22:02:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:19,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:19,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:19,579 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 22:02:19,592 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 22:02:19,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:20,349 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:20,350 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 22:02:20,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:20,377 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 22:02:22,685 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 22:02:22,685 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239138082] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:22,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:22,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2022-03-15 22:02:22,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [746919166] [2022-03-15 22:02:22,686 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:22,688 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:22,693 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:22,693 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:22,932 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 22:02:22,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:02:22,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:22,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:02:22,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:22,933 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 22:02:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:23,185 INFO L93 Difference]: Finished difference Result 494 states and 1157 transitions. [2022-03-15 22:02:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:02:23,185 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 22:02:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:23,186 INFO L225 Difference]: With dead ends: 494 [2022-03-15 22:02:23,186 INFO L226 Difference]: Without dead ends: 452 [2022-03-15 22:02:23,187 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 22:02:23,187 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 22:02:23,187 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 22:02:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-15 22:02:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 189. [2022-03-15 22:02:23,191 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 22:02:23,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 450 transitions. [2022-03-15 22:02:23,191 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 450 transitions. Word has length 24 [2022-03-15 22:02:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:23,191 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 450 transitions. [2022-03-15 22:02:23,191 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 22:02:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 450 transitions. [2022-03-15 22:02:23,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:23,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:23,192 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:23,210 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 22:02:23,392 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 22:02:23,392 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:23,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash 530286430, now seen corresponding path program 26 times [2022-03-15 22:02:23,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:23,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729456929] [2022-03-15 22:02:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:23,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:23,610 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 22:02:23,610 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:23,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729456929] [2022-03-15 22:02:23,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729456929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:23,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254615793] [2022-03-15 22:02:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:02:23,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:23,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:23,612 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 22:02:23,612 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 22:02:23,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:02:23,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:23,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:23,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:24,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:24,031 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 22:02:24,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:24,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:24,332 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 22:02:24,343 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 22:02:24,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:25,135 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:25,135 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 22:02:25,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:25,164 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 22:02:27,532 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 22:02:27,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254615793] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:27,532 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:27,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 31 [2022-03-15 22:02:27,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [116099875] [2022-03-15 22:02:27,533 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:27,534 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:27,539 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:02:27,539 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:27,669 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 22:02:27,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:27,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:27,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:27,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:02:27,670 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 22:02:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:27,869 INFO L93 Difference]: Finished difference Result 381 states and 881 transitions. [2022-03-15 22:02:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-15 22:02:27,869 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 22:02:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:27,870 INFO L225 Difference]: With dead ends: 381 [2022-03-15 22:02:27,871 INFO L226 Difference]: Without dead ends: 348 [2022-03-15 22:02:27,871 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 22:02:27,871 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 52 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 22:02:27,871 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 22:02:27,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-03-15 22:02:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 210. [2022-03-15 22:02:27,874 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 22:02:27,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 504 transitions. [2022-03-15 22:02:27,875 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 504 transitions. Word has length 24 [2022-03-15 22:02:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:27,875 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 504 transitions. [2022-03-15 22:02:27,875 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 22:02:27,875 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 504 transitions. [2022-03-15 22:02:27,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:27,875 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:27,875 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:27,891 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 22:02:28,075 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 22:02:28,076 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:28,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:28,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1192290818, now seen corresponding path program 27 times [2022-03-15 22:02:28,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:28,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993832732] [2022-03-15 22:02:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:28,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:28,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:28,291 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 22:02:28,292 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:28,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993832732] [2022-03-15 22:02:28,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993832732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:28,292 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276876947] [2022-03-15 22:02:28,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:02:28,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:28,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:28,293 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 22:02:28,293 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 22:02:28,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-15 22:02:28,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:29,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:29,262 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 22:02:29,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:29,808 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:29,808 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 22:02:30,737 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 22:02:30,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:32,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:32,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:32,736 INFO L353 Elim1Store]: treesize reduction 16, result has 82.4 percent of original size [2022-03-15 22:02:32,736 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 22:02:32,761 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:32,762 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 22:02:33,560 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 22:02:33,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276876947] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:33,560 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:33,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 13] total 32 [2022-03-15 22:02:33,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1573337916] [2022-03-15 22:02:33,561 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:33,562 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:33,567 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2022-03-15 22:02:33,567 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:33,726 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 22:02:33,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-15 22:02:33,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:33,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-15 22:02:33,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1001, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:02:33,727 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 22:02:33,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:33,958 INFO L93 Difference]: Finished difference Result 465 states and 1068 transitions. [2022-03-15 22:02:33,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-15 22:02:33,958 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 22:02:33,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:33,959 INFO L225 Difference]: With dead ends: 465 [2022-03-15 22:02:33,959 INFO L226 Difference]: Without dead ends: 410 [2022-03-15 22:02:33,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=281, Invalid=1051, Unknown=0, NotChecked=0, Total=1332 [2022-03-15 22:02:33,960 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 22:02:33,961 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 22:02:33,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2022-03-15 22:02:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 242. [2022-03-15 22:02:33,964 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 22:02:33,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 581 transitions. [2022-03-15 22:02:33,964 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 581 transitions. Word has length 24 [2022-03-15 22:02:33,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:33,964 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 581 transitions. [2022-03-15 22:02:33,964 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 22:02:33,965 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 581 transitions. [2022-03-15 22:02:33,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:33,965 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:33,965 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:33,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-03-15 22:02:34,170 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 22:02:34,170 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:34,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:34,171 INFO L85 PathProgramCache]: Analyzing trace with hash 105975194, now seen corresponding path program 28 times [2022-03-15 22:02:34,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:34,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365576967] [2022-03-15 22:02:34,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:34,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:34,391 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 22:02:34,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:34,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365576967] [2022-03-15 22:02:34,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365576967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:34,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628302200] [2022-03-15 22:02:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:02:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:34,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:34,392 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 22:02:34,394 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 22:02:34,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:02:34,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:34,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:34,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:34,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:34,705 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 22:02:35,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:35,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:35,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:35,029 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 22:02:35,040 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 22:02:35,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:35,832 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:35,832 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 22:02:35,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:35,859 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 22:02:37,926 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 22:02:37,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628302200] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:37,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:37,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-03-15 22:02:37,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1225108955] [2022-03-15 22:02:37,926 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:37,928 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:37,933 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 36 transitions. [2022-03-15 22:02:37,933 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:38,023 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 22:02:38,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:02:38,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:38,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:02:38,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=964, Unknown=0, NotChecked=0, Total=1190 [2022-03-15 22:02:38,024 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 22:02:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:38,259 INFO L93 Difference]: Finished difference Result 479 states and 1148 transitions. [2022-03-15 22:02:38,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:02:38,259 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 22:02:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:38,261 INFO L225 Difference]: With dead ends: 479 [2022-03-15 22:02:38,261 INFO L226 Difference]: Without dead ends: 470 [2022-03-15 22:02:38,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=1005, Unknown=0, NotChecked=0, Total=1260 [2022-03-15 22:02:38,262 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 22:02:38,262 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 22:02:38,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-03-15 22:02:38,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 281. [2022-03-15 22:02:38,266 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 22:02:38,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 675 transitions. [2022-03-15 22:02:38,266 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 675 transitions. Word has length 24 [2022-03-15 22:02:38,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:38,266 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 675 transitions. [2022-03-15 22:02:38,267 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 22:02:38,267 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 675 transitions. [2022-03-15 22:02:38,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:38,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:38,267 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:38,283 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 22:02:38,483 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 22:02:38,483 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:38,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:38,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1893152290, now seen corresponding path program 29 times [2022-03-15 22:02:38,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:38,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159218444] [2022-03-15 22:02:38,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:38,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:38,726 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 22:02:38,726 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:38,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159218444] [2022-03-15 22:02:38,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159218444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:38,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996423815] [2022-03-15 22:02:38,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:02:38,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:38,728 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 22:02:38,728 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 22:02:38,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-15 22:02:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-15 22:02:38,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:39,084 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:39,084 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 22:02:39,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:39,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:39,412 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 22:02:39,419 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 22:02:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:40,187 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:40,187 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 22:02:40,213 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:40,214 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 22:02:42,015 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 22:02:42,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996423815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:42,015 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:42,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-15 22:02:42,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [969853561] [2022-03-15 22:02:42,015 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:42,017 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:42,034 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 44 transitions. [2022-03-15 22:02:42,034 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:42,167 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 22:02:42,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:42,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:42,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:42,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2022-03-15 22:02:42,168 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 22:02:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:42,408 INFO L93 Difference]: Finished difference Result 526 states and 1254 transitions. [2022-03-15 22:02:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:02:42,408 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 22:02:42,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:42,409 INFO L225 Difference]: With dead ends: 526 [2022-03-15 22:02:42,409 INFO L226 Difference]: Without dead ends: 508 [2022-03-15 22:02:42,410 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 22:02:42,410 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 73 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 22:02:42,410 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 22:02:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2022-03-15 22:02:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 267. [2022-03-15 22:02:42,414 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 22:02:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 643 transitions. [2022-03-15 22:02:42,419 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 643 transitions. Word has length 24 [2022-03-15 22:02:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:42,419 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 643 transitions. [2022-03-15 22:02:42,419 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 22:02:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 643 transitions. [2022-03-15 22:02:42,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:42,421 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:42,421 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:42,437 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 22:02:42,621 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 22:02:42,621 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:42,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash 572326002, now seen corresponding path program 30 times [2022-03-15 22:02:42,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:42,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303834339] [2022-03-15 22:02:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:42,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:42,896 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 22:02:42,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:42,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303834339] [2022-03-15 22:02:42,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303834339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:42,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667361990] [2022-03-15 22:02:42,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:02:42,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:42,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:42,908 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 22:02:42,909 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 22:02:42,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-15 22:02:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-15 22:02:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:43,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:43,229 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 22:02:43,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:43,668 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:43,668 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 22:02:44,911 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 22:02:44,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:46,279 INFO L353 Elim1Store]: treesize reduction 32, result has 67.0 percent of original size [2022-03-15 22:02:46,279 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 22:02:46,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:46,303 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 22:02:46,890 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 22:02:46,891 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667361990] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:46,891 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:46,891 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 35 [2022-03-15 22:02:46,891 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [878122317] [2022-03-15 22:02:46,891 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:46,893 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:46,898 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 52 transitions. [2022-03-15 22:02:46,898 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:47,163 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 22:02:47,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:47,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:47,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:47,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1147, Unknown=0, NotChecked=0, Total=1406 [2022-03-15 22:02:47,167 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 22:02:47,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:47,363 INFO L93 Difference]: Finished difference Result 483 states and 1153 transitions. [2022-03-15 22:02:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:02:47,363 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 22:02:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:47,366 INFO L225 Difference]: With dead ends: 483 [2022-03-15 22:02:47,366 INFO L226 Difference]: Without dead ends: 474 [2022-03-15 22:02:47,366 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 22:02:47,367 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 22:02:47,369 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 22:02:47,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-15 22:02:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 265. [2022-03-15 22:02:47,379 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 22:02:47,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 641 transitions. [2022-03-15 22:02:47,379 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 641 transitions. Word has length 24 [2022-03-15 22:02:47,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:47,379 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 641 transitions. [2022-03-15 22:02:47,379 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 22:02:47,379 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 641 transitions. [2022-03-15 22:02:47,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-15 22:02:47,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:47,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:47,405 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 22:02:47,595 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 22:02:47,595 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:47,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1726384446, now seen corresponding path program 31 times [2022-03-15 22:02:47,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:47,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552945106] [2022-03-15 22:02:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:47,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:47,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:47,842 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 22:02:47,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:47,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552945106] [2022-03-15 22:02:47,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552945106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:47,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24570037] [2022-03-15 22:02:47,842 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:02:47,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:47,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:47,843 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 22:02:47,844 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 22:02:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:47,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-15 22:02:47,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:48,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:48,162 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 22:02:48,422 INFO L353 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2022-03-15 22:02:48,422 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 22:02:48,429 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 22:02:48,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:49,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:49,036 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 22:02:49,178 INFO L353 Elim1Store]: treesize reduction 156, result has 49.5 percent of original size [2022-03-15 22:02:49,178 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 22:02:51,369 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 22:02:51,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24570037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:51,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:51,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2022-03-15 22:02:51,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1815917203] [2022-03-15 22:02:51,369 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:51,371 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:51,377 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 60 transitions. [2022-03-15 22:02:51,377 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:51,770 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 22:02:51,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:02:51,770 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:51,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:02:51,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2022-03-15 22:02:51,771 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 22:02:52,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:52,000 INFO L93 Difference]: Finished difference Result 493 states and 1177 transitions. [2022-03-15 22:02:52,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:02:52,001 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 22:02:52,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:52,002 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:02:52,002 INFO L226 Difference]: Without dead ends: 484 [2022-03-15 22:02:52,002 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 22:02:52,003 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 72 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 22:02:52,003 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 22:02:52,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-03-15 22:02:52,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 270. [2022-03-15 22:02:52,007 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 22:02:52,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 653 transitions. [2022-03-15 22:02:52,007 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 653 transitions. Word has length 24 [2022-03-15 22:02:52,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:52,008 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 653 transitions. [2022-03-15 22:02:52,008 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 22:02:52,008 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 653 transitions. [2022-03-15 22:02:52,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-15 22:02:52,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:52,008 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:52,025 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 22:02:52,209 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 22:02:52,209 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:52,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:52,209 INFO L85 PathProgramCache]: Analyzing trace with hash 2068367090, now seen corresponding path program 32 times [2022-03-15 22:02:52,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:52,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451154585] [2022-03-15 22:02:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:52,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:52,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:52,271 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 22:02:52,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:52,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451154585] [2022-03-15 22:02:52,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451154585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:52,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358330911] [2022-03-15 22:02:52,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:02:52,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:52,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:52,272 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 22:02:52,273 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 22:02:52,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:02:52,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:52,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-15 22:02:52,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:52,357 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 22:02:52,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:02:52,396 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 22:02:52,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358330911] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:02:52,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:02:52,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2022-03-15 22:02:52,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1159700648] [2022-03-15 22:02:52,397 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:02:52,399 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:02:52,404 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 38 transitions. [2022-03-15 22:02:52,405 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:02:52,422 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:02:52,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-15 22:02:52,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:02:52,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-15 22:02:52,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-03-15 22:02:52,423 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 22:02:52,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:02:52,483 INFO L93 Difference]: Finished difference Result 451 states and 1044 transitions. [2022-03-15 22:02:52,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-15 22:02:52,484 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 22:02:52,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:02:52,485 INFO L225 Difference]: With dead ends: 451 [2022-03-15 22:02:52,485 INFO L226 Difference]: Without dead ends: 430 [2022-03-15 22:02:52,485 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 22:02:52,485 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:02:52,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 0 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:02:52,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-03-15 22:02:52,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 338. [2022-03-15 22:02:52,490 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 22:02:52,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 824 transitions. [2022-03-15 22:02:52,490 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 824 transitions. Word has length 26 [2022-03-15 22:02:52,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:02:52,490 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 824 transitions. [2022-03-15 22:02:52,490 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 22:02:52,491 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 824 transitions. [2022-03-15 22:02:52,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:02:52,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:02:52,491 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:02:52,525 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 22:02:52,707 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 22:02:52,708 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:02:52,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:02:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash 23776897, now seen corresponding path program 33 times [2022-03-15 22:02:52,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:02:52,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712262419] [2022-03-15 22:02:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:02:52,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:02:52,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:02:52,994 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 22:02:52,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:02:52,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712262419] [2022-03-15 22:02:52,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712262419] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:02:52,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190164309] [2022-03-15 22:02:52,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:02:52,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:02:52,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:02:52,996 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 22:02:53,019 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 22:02:53,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:02:53,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:02:53,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:02:53,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:02:54,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:54,235 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 22:02:55,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:02:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:02:55,287 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:02:55,287 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 22:02:58,839 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 22:02:58,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:15,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:15,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:15,320 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:03:15,320 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 22:03:15,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:15,365 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 22:03:21,527 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 22:03:21,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190164309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:21,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:21,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 16] total 40 [2022-03-15 22:03:21,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [477011880] [2022-03-15 22:03:21,528 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:21,531 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:21,538 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:03:21,538 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:21,824 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 22:03:21,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:03:21,825 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:03:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1521, Unknown=4, NotChecked=0, Total=1806 [2022-03-15 22:03:21,825 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 22:03:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:22,082 INFO L93 Difference]: Finished difference Result 981 states and 2376 transitions. [2022-03-15 22:03:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-15 22:03:22,083 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 22:03:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:22,086 INFO L225 Difference]: With dead ends: 981 [2022-03-15 22:03:22,086 INFO L226 Difference]: Without dead ends: 939 [2022-03-15 22:03:22,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=322, Invalid=1744, Unknown=4, NotChecked=0, Total=2070 [2022-03-15 22:03:22,087 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 22:03:22,087 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 22:03:22,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-03-15 22:03:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 292. [2022-03-15 22:03:22,094 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 22:03:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 715 transitions. [2022-03-15 22:03:22,095 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 715 transitions. Word has length 28 [2022-03-15 22:03:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 715 transitions. [2022-03-15 22:03:22,095 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 22:03:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 715 transitions. [2022-03-15 22:03:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:22,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:22,096 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-15 22:03:22,311 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 22:03:22,311 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:22,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:22,312 INFO L85 PathProgramCache]: Analyzing trace with hash 939149741, now seen corresponding path program 34 times [2022-03-15 22:03:22,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:22,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166930479] [2022-03-15 22:03:22,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:22,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:22,585 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 22:03:22,585 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:22,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166930479] [2022-03-15 22:03:22,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166930479] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:22,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527700517] [2022-03-15 22:03:22,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:03:22,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:22,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:22,587 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 22:03:22,589 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 22:03:22,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:03:22,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:22,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:03:22,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:23,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:23,316 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 22:03:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:23,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:23,684 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 22:03:23,695 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 22:03:23,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:25,157 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:03:25,158 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 22:03:25,208 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:25,208 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 22:03:41,565 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 22:03:41,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527700517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:41,565 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:41,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 38 [2022-03-15 22:03:41,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1120877446] [2022-03-15 22:03:41,565 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:41,568 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:41,574 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:03:41,574 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:41,719 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 22:03:41,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:03:41,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:03:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:03:41,720 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 22:03:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:42,031 INFO L93 Difference]: Finished difference Result 472 states and 1089 transitions. [2022-03-15 22:03:42,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:03:42,031 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 22:03:42,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:42,033 INFO L225 Difference]: With dead ends: 472 [2022-03-15 22:03:42,033 INFO L226 Difference]: Without dead ends: 419 [2022-03-15 22:03:42,033 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 22:03:42,034 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 22:03:42,034 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 22:03:42,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-03-15 22:03:42,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 274. [2022-03-15 22:03:42,037 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 22:03:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 665 transitions. [2022-03-15 22:03:42,038 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 665 transitions. Word has length 28 [2022-03-15 22:03:42,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:42,038 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 665 transitions. [2022-03-15 22:03:42,038 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 22:03:42,038 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 665 transitions. [2022-03-15 22:03:42,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:42,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:42,039 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:42,055 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 22:03:42,246 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 22:03:42,246 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:42,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 514838505, now seen corresponding path program 35 times [2022-03-15 22:03:42,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:42,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325118857] [2022-03-15 22:03:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:42,516 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 22:03:42,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325118857] [2022-03-15 22:03:42,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325118857] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089260379] [2022-03-15 22:03:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:03:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:42,518 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 22:03:42,518 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 22:03:42,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-03-15 22:03:42,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:03:42,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:43,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:43,076 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 22:03:43,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:43,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:43,521 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 22:03:43,532 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 22:03:43,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:03:44,975 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:03:44,975 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 22:03:45,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:45,034 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 22:03:51,964 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 22:03:51,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089260379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:03:51,964 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:03:51,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2022-03-15 22:03:51,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1805395055] [2022-03-15 22:03:51,965 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:03:51,967 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:03:51,974 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:03:51,974 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:03:52,067 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 22:03:52,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:03:52,068 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:03:52,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:03:52,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1434, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:03:52,069 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 22:03:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:03:52,386 INFO L93 Difference]: Finished difference Result 493 states and 1180 transitions. [2022-03-15 22:03:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-15 22:03:52,386 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 22:03:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:03:52,388 INFO L225 Difference]: With dead ends: 493 [2022-03-15 22:03:52,388 INFO L226 Difference]: Without dead ends: 476 [2022-03-15 22:03:52,388 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 22:03:52,389 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 22:03:52,389 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 22:03:52,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-03-15 22:03:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 294. [2022-03-15 22:03:52,393 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 22:03:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 711 transitions. [2022-03-15 22:03:52,393 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 711 transitions. Word has length 28 [2022-03-15 22:03:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:03:52,393 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 711 transitions. [2022-03-15 22:03:52,393 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 22:03:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 711 transitions. [2022-03-15 22:03:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:03:52,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:03:52,394 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:03:52,410 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 22:03:52,595 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 22:03:52,595 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:03:52,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:03:52,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1992951695, now seen corresponding path program 36 times [2022-03-15 22:03:52,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:03:52,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265739141] [2022-03-15 22:03:52,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:03:52,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:03:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:03:52,881 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 22:03:52,881 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:03:52,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265739141] [2022-03-15 22:03:52,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265739141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:03:52,881 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769804740] [2022-03-15 22:03:52,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:03:52,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:03:52,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:03:52,883 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 22:03:52,883 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 22:03:52,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:03:52,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:03:52,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:03:52,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:03:53,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:53,539 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 22:03:54,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:03:54,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:03:54,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:03:54,824 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 22:03:59,709 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 22:03:59,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:11,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:11,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:11,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:11,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:11,998 INFO L353 Elim1Store]: treesize reduction 36, result has 80.5 percent of original size [2022-03-15 22:04:11,999 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 22:04:12,052 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:12,053 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 218 treesize of output 240 [2022-03-15 22:04:14,892 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 22:04:14,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769804740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:14,892 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:14,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:04:14,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [167694155] [2022-03-15 22:04:14,892 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:14,895 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:14,902 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:04:14,902 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:15,079 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 22:04:15,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:15,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:15,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:15,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1649, Unknown=2, NotChecked=0, Total=1980 [2022-03-15 22:04:15,080 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 22:04:15,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:15,359 INFO L93 Difference]: Finished difference Result 629 states and 1501 transitions. [2022-03-15 22:04:15,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:04:15,359 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 22:04:15,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:15,361 INFO L225 Difference]: With dead ends: 629 [2022-03-15 22:04:15,361 INFO L226 Difference]: Without dead ends: 601 [2022-03-15 22:04:15,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=380, Invalid=1874, Unknown=2, NotChecked=0, Total=2256 [2022-03-15 22:04:15,362 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 22:04:15,362 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 22:04:15,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-03-15 22:04:15,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 274. [2022-03-15 22:04:15,366 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 22:04:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 661 transitions. [2022-03-15 22:04:15,366 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 661 transitions. Word has length 28 [2022-03-15 22:04:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:15,366 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 661 transitions. [2022-03-15 22:04:15,366 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 22:04:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 661 transitions. [2022-03-15 22:04:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:15,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:15,367 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:15,385 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 22:04:15,579 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 22:04:15,579 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash 981189313, now seen corresponding path program 37 times [2022-03-15 22:04:15,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:15,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353720794] [2022-03-15 22:04:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:15,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:15,909 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 22:04:15,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:15,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353720794] [2022-03-15 22:04:15,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353720794] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:15,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228562863] [2022-03-15 22:04:15,909 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:04:15,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:15,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:15,910 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 22:04:15,911 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 22:04:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:15,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:15,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:16,479 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:16,480 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 22:04:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:16,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:16,966 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 22:04:16,973 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 22:04:16,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:18,387 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:04:18,387 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 22:04:18,447 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:18,448 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 22:04:30,486 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 22:04:30,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228562863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:30,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:30,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2022-03-15 22:04:30,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1118773781] [2022-03-15 22:04:30,486 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:30,489 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:30,496 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:04:30,496 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:30,738 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 22:04:30,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:30,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:30,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:30,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-03-15 22:04:30,741 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 22:04:30,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:30,952 INFO L93 Difference]: Finished difference Result 574 states and 1370 transitions. [2022-03-15 22:04:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:04:30,952 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 22:04:30,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:30,954 INFO L225 Difference]: With dead ends: 574 [2022-03-15 22:04:30,954 INFO L226 Difference]: Without dead ends: 551 [2022-03-15 22:04:30,954 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 22:04:30,954 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, 0.1s IncrementalHoareTripleChecker+Time [2022-03-15 22:04:30,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 1 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-15 22:04:30,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-03-15 22:04:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 244. [2022-03-15 22:04:30,958 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 22:04:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 591 transitions. [2022-03-15 22:04:30,959 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 591 transitions. Word has length 28 [2022-03-15 22:04:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:30,959 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 591 transitions. [2022-03-15 22:04:30,959 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 22:04:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 591 transitions. [2022-03-15 22:04:30,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:30,959 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:30,959 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:30,982 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 22:04:31,175 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 22:04:31,175 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:31,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1317521135, now seen corresponding path program 38 times [2022-03-15 22:04:31,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:31,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242692513] [2022-03-15 22:04:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:31,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:31,520 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 22:04:31,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:31,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242692513] [2022-03-15 22:04:31,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242692513] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:31,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643057454] [2022-03-15 22:04:31,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:04:31,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:31,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:31,522 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 22:04:31,523 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 22:04:31,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:04:31,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:04:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:32,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:32,207 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 22:04:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:36,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:36,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:36,562 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 22:04:37,755 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 22:04:37,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:04:48,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:49,236 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:04:49,237 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 22:04:49,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:49,300 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 22:04:53,249 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 22:04:53,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643057454] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:04:53,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:04:53,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 42 [2022-03-15 22:04:53,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1932221276] [2022-03-15 22:04:53,249 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:04:53,252 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:04:53,259 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:04:53,259 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:04:53,669 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 22:04:53,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:04:53,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:04:53,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:04:53,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1642, Unknown=1, NotChecked=0, Total=1980 [2022-03-15 22:04:53,670 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 22:04:53,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:04:53,972 INFO L93 Difference]: Finished difference Result 489 states and 1155 transitions. [2022-03-15 22:04:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:04:53,972 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 22:04:53,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:04:53,974 INFO L225 Difference]: With dead ends: 489 [2022-03-15 22:04:53,974 INFO L226 Difference]: Without dead ends: 462 [2022-03-15 22:04:53,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=361, Invalid=1800, Unknown=1, NotChecked=0, Total=2162 [2022-03-15 22:04:53,974 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 22:04:53,974 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 22:04:53,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-03-15 22:04:53,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 230. [2022-03-15 22:04:53,978 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 22:04:53,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 557 transitions. [2022-03-15 22:04:53,978 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 557 transitions. Word has length 28 [2022-03-15 22:04:53,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:04:53,978 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 557 transitions. [2022-03-15 22:04:53,978 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 22:04:53,979 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 557 transitions. [2022-03-15 22:04:53,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:04:53,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:04:53,979 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:04:53,996 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 22:04:54,183 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 22:04:54,183 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:04:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:04:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash 272044009, now seen corresponding path program 39 times [2022-03-15 22:04:54,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:04:54,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961783941] [2022-03-15 22:04:54,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:04:54,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:04:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:04:54,467 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 22:04:54,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:04:54,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961783941] [2022-03-15 22:04:54,467 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961783941] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:04:54,467 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943795730] [2022-03-15 22:04:54,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:04:54,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:04:54,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:04:54,468 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 22:04:54,469 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 22:04:54,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:04:54,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:04:54,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:04:54,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:04:56,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:56,708 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 22:04:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:04:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:04:57,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:04:57,200 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 22:04:58,353 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 22:04:58,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:00,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:00,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:00,259 INFO L353 Elim1Store]: treesize reduction 22, result has 81.2 percent of original size [2022-03-15 22:05:00,260 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 22:05:00,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:00,304 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 22:05:02,545 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 22:05:02,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943795730] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:02,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:02,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:05:02,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1099641596] [2022-03-15 22:05:02,545 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:02,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:02,566 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:05:02,566 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:02,673 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 22:05:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-15 22:05:02,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-15 22:05:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1468, Unknown=0, NotChecked=0, Total=1806 [2022-03-15 22:05:02,674 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 22:05:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:02,988 INFO L93 Difference]: Finished difference Result 435 states and 1004 transitions. [2022-03-15 22:05:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:05:02,989 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 22:05:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:02,990 INFO L225 Difference]: With dead ends: 435 [2022-03-15 22:05:02,990 INFO L226 Difference]: Without dead ends: 376 [2022-03-15 22:05:02,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=378, Invalid=1602, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:02,990 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 22:05:02,991 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 22:05:02,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-03-15 22:05:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 257. [2022-03-15 22:05:02,994 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 22:05:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 623 transitions. [2022-03-15 22:05:02,994 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 623 transitions. Word has length 28 [2022-03-15 22:05:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:02,994 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 623 transitions. [2022-03-15 22:05:02,994 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 22:05:02,995 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 623 transitions. [2022-03-15 22:05:02,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:02,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:02,996 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:03,014 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 22:05:03,207 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 22:05:03,207 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:03,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:03,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1618573871, now seen corresponding path program 40 times [2022-03-15 22:05:03,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:03,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586524316] [2022-03-15 22:05:03,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:03,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:03,539 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 22:05:03,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:03,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586524316] [2022-03-15 22:05:03,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586524316] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:03,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254529428] [2022-03-15 22:05:03,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:05:03,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:03,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:03,541 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 22:05:03,542 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 22:05:03,568 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:05:03,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:03,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:05:03,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:04,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:04,243 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 22:05:04,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:04,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:04,735 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 22:05:04,748 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 22:05:04,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:05,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:05,901 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 22:05:06,256 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:05:06,256 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 22:05:10,753 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 22:05:10,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254529428] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:10,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:10,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 36 [2022-03-15 22:05:10,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [346741398] [2022-03-15 22:05:10,754 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:10,756 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:10,764 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:05:10,764 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:11,217 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 22:05:11,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-15 22:05:11,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:11,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-15 22:05:11,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:05:11,217 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 22:05:11,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:11,632 INFO L93 Difference]: Finished difference Result 816 states and 1947 transitions. [2022-03-15 22:05:11,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:05:11,633 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 22:05:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:11,635 INFO L225 Difference]: With dead ends: 816 [2022-03-15 22:05:11,635 INFO L226 Difference]: Without dead ends: 747 [2022-03-15 22:05:11,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:05:11,636 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, 0.3s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:11,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-15 22:05:11,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 747 states. [2022-03-15 22:05:11,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 747 to 283. [2022-03-15 22:05:11,640 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 22:05:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 687 transitions. [2022-03-15 22:05:11,640 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 687 transitions. Word has length 28 [2022-03-15 22:05:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 687 transitions. [2022-03-15 22:05:11,640 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 22:05:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 687 transitions. [2022-03-15 22:05:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:11,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:11,641 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:11,657 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 22:05:11,841 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 22:05:11,842 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash 905320877, now seen corresponding path program 41 times [2022-03-15 22:05:11,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:11,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864137927] [2022-03-15 22:05:11,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:11,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:12,194 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 22:05:12,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:12,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864137927] [2022-03-15 22:05:12,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864137927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:12,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865120620] [2022-03-15 22:05:12,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:05:12,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:12,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:12,207 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 22:05:12,210 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 22:05:12,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:05:12,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:12,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:05:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:12,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:12,893 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 22:05:13,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:13,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:13,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:13,406 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 22:05:13,418 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 22:05:13,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:14,950 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:05:14,950 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 22:05:15,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:15,005 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 22:05:26,524 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 22:05:26,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865120620] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:26,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:26,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 40 [2022-03-15 22:05:26,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1745467871] [2022-03-15 22:05:26,525 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:26,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:26,534 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:05:26,534 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:26,709 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 22:05:26,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:05:26,710 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:05:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=1588, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:26,710 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 22:05:27,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:27,093 INFO L93 Difference]: Finished difference Result 561 states and 1327 transitions. [2022-03-15 22:05:27,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-15 22:05:27,094 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 22:05:27,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:27,095 INFO L225 Difference]: With dead ends: 561 [2022-03-15 22:05:27,095 INFO L226 Difference]: Without dead ends: 510 [2022-03-15 22:05:27,096 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 22:05:27,096 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 22:05:27,096 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 22:05:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-03-15 22:05:27,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 318. [2022-03-15 22:05:27,100 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 22:05:27,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 777 transitions. [2022-03-15 22:05:27,100 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 777 transitions. Word has length 28 [2022-03-15 22:05:27,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:27,100 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 777 transitions. [2022-03-15 22:05:27,101 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 22:05:27,101 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 777 transitions. [2022-03-15 22:05:27,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:27,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:27,101 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:27,129 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 22:05:27,327 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 22:05:27,327 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1194208867, now seen corresponding path program 42 times [2022-03-15 22:05:27,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:27,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183443079] [2022-03-15 22:05:27,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:27,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:27,714 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 22:05:27,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:27,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183443079] [2022-03-15 22:05:27,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183443079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:27,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945408763] [2022-03-15 22:05:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:05:27,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:27,716 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 22:05:27,716 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 22:05:27,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-03-15 22:05:27,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:27,772 WARN L261 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-15 22:05:27,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:30,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:30,538 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 22:05:30,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:30,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:31,054 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:31,054 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 22:05:32,478 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 22:05:32,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:34,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:34,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,456 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:34,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:34,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:34,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:34,484 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 22:05:34,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:34,532 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 22:05:35,329 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 22:05:35,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945408763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:35,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:35,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 16] total 40 [2022-03-15 22:05:35,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [410410148] [2022-03-15 22:05:35,330 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:35,332 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:35,339 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2022-03-15 22:05:35,339 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:35,531 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 22:05:35,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-15 22:05:35,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:35,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-15 22:05:35,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=1532, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:35,532 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 22:05:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:35,940 INFO L93 Difference]: Finished difference Result 682 states and 1600 transitions. [2022-03-15 22:05:35,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-15 22:05:35,941 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 22:05:35,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:35,943 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:05:35,943 INFO L226 Difference]: Without dead ends: 604 [2022-03-15 22:05:35,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=386, Invalid=1594, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:35,943 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:05:35,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 1 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:05:35,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-03-15 22:05:35,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 368. [2022-03-15 22:05:35,948 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 22:05:35,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 898 transitions. [2022-03-15 22:05:35,949 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 898 transitions. Word has length 28 [2022-03-15 22:05:35,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:35,949 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 898 transitions. [2022-03-15 22:05:35,949 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 22:05:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 898 transitions. [2022-03-15 22:05:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:35,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:35,950 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:35,978 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 22:05:36,172 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 22:05:36,173 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:36,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:36,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1164116201, now seen corresponding path program 43 times [2022-03-15 22:05:36,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:36,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598350210] [2022-03-15 22:05:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:36,614 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 22:05:36,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:36,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598350210] [2022-03-15 22:05:36,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598350210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:36,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638249815] [2022-03-15 22:05:36,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:05:36,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:36,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:36,616 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 22:05:36,616 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 22:05:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:36,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:05:36,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:37,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:37,207 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 22:05:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:37,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:37,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:37,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 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 22:05:37,866 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 22:05:37,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:05:39,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:39,162 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 22:05:39,520 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:05:39,520 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 22:05:47,153 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 22:05:47,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638249815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:05:47,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:05:47,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 41 [2022-03-15 22:05:47,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [287458856] [2022-03-15 22:05:47,153 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:05:47,156 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:05:47,162 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 40 transitions. [2022-03-15 22:05:47,162 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:05:47,264 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 22:05:47,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-15 22:05:47,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:05:47,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-15 22:05:47,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-03-15 22:05:47,265 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 22:05:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:05:47,664 INFO L93 Difference]: Finished difference Result 682 states and 1659 transitions. [2022-03-15 22:05:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-15 22:05:47,665 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 22:05:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:05:47,667 INFO L225 Difference]: With dead ends: 682 [2022-03-15 22:05:47,667 INFO L226 Difference]: Without dead ends: 673 [2022-03-15 22:05:47,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=356, Invalid=1624, Unknown=0, NotChecked=0, Total=1980 [2022-03-15 22:05:47,668 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 22:05:47,668 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 22:05:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-03-15 22:05:47,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 431. [2022-03-15 22:05:47,673 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 22:05:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 1048 transitions. [2022-03-15 22:05:47,674 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 1048 transitions. Word has length 28 [2022-03-15 22:05:47,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:05:47,674 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 1048 transitions. [2022-03-15 22:05:47,674 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 22:05:47,674 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 1048 transitions. [2022-03-15 22:05:47,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:05:47,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:05:47,675 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:05:47,691 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 22:05:47,884 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 22:05:47,884 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:05:47,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:05:47,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1343673999, now seen corresponding path program 44 times [2022-03-15 22:05:47,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:05:47,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931937803] [2022-03-15 22:05:47,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:05:47,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:05:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:05:48,321 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 22:05:48,322 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:05:48,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931937803] [2022-03-15 22:05:48,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931937803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:05:48,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395058353] [2022-03-15 22:05:48,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:05:48,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:05:48,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:05:48,323 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 22:05:48,323 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 22:05:48,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:05:48,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:05:48,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 58 conjunts are in the unsatisfiable core [2022-03-15 22:05:48,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:05:49,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:49,020 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 22:05:53,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:05:53,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:05:53,736 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:05:53,737 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 22:05:54,944 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 22:05:54,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:03,419 INFO L353 Elim1Store]: treesize reduction 156, result has 59.5 percent of original size [2022-03-15 22:06:03,420 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 22:06:03,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:03,496 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 271 treesize of output 291 [2022-03-15 22:06:50,042 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 22:06:50,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395058353] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:06:50,043 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:06:50,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:06:50,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1046933370] [2022-03-15 22:06:50,043 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:06:50,045 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:06:50,052 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 48 transitions. [2022-03-15 22:06:50,052 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:06:50,249 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 22:06:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:06:50,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:06:50,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:06:50,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1763, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:06:50,250 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 22:06:50,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:06:50,637 INFO L93 Difference]: Finished difference Result 750 states and 1817 transitions. [2022-03-15 22:06:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:06:50,637 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 22:06:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:06:50,640 INFO L225 Difference]: With dead ends: 750 [2022-03-15 22:06:50,640 INFO L226 Difference]: Without dead ends: 732 [2022-03-15 22:06:50,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=459, Invalid=1893, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:06:50,640 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 78 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 22:06:50,640 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 22:06:50,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-03-15 22:06:50,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 405. [2022-03-15 22:06:50,646 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 22:06:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 986 transitions. [2022-03-15 22:06:50,646 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 986 transitions. Word has length 28 [2022-03-15 22:06:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:06:50,647 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 986 transitions. [2022-03-15 22:06:50,647 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 22:06:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 986 transitions. [2022-03-15 22:06:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:06:50,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:06:50,647 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:06:50,663 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 22:06:50,855 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 22:06:50,855 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:06:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:06:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1630467009, now seen corresponding path program 45 times [2022-03-15 22:06:50,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:06:50,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007488676] [2022-03-15 22:06:50,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:06:50,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:06:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:06:51,285 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 22:06:51,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:06:51,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007488676] [2022-03-15 22:06:51,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007488676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:06:51,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676180904] [2022-03-15 22:06:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:06:51,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:06:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:06:51,287 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 22:06:51,288 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 22:06:51,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-15 22:06:51,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:06:51,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 60 conjunts are in the unsatisfiable core [2022-03-15 22:06:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:06:52,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:52,022 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 22:06:52,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:52,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:52,660 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:52,660 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 22:06:52,822 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 22:06:52,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:06:54,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:06:54,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 133 [2022-03-15 22:06:54,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:06:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:06:54,945 INFO L353 Elim1Store]: treesize reduction 50, result has 73.8 percent of original size [2022-03-15 22:06:54,946 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 22:07:01,179 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 22:07:01,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676180904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:01,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:01,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 44 [2022-03-15 22:07:01,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1111668673] [2022-03-15 22:07:01,180 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:01,182 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:01,189 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 56 transitions. [2022-03-15 22:07:01,190 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:01,476 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 22:07:01,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:01,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:01,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:01,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2022-03-15 22:07:01,477 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 22:07:01,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:01,821 INFO L93 Difference]: Finished difference Result 705 states and 1714 transitions. [2022-03-15 22:07:01,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:07:01,822 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 22:07:01,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:01,824 INFO L225 Difference]: With dead ends: 705 [2022-03-15 22:07:01,824 INFO L226 Difference]: Without dead ends: 696 [2022-03-15 22:07:01,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2022-03-15 22:07:01,824 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 22:07:01,824 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 22:07:01,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-03-15 22:07:01,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 397. [2022-03-15 22:07:01,830 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 22:07:01,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 970 transitions. [2022-03-15 22:07:01,830 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 970 transitions. Word has length 28 [2022-03-15 22:07:01,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:01,830 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 970 transitions. [2022-03-15 22:07:01,830 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 22:07:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 970 transitions. [2022-03-15 22:07:01,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:07:01,831 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:01,831 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:01,847 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 22:07:02,047 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 22:07:02,047 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:02,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:02,047 INFO L85 PathProgramCache]: Analyzing trace with hash -668243439, now seen corresponding path program 46 times [2022-03-15 22:07:02,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:02,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816863231] [2022-03-15 22:07:02,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:02,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:02,454 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 22:07:02,454 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:02,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816863231] [2022-03-15 22:07:02,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816863231] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:02,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923758712] [2022-03-15 22:07:02,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:07:02,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:02,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:02,455 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 22:07:02,457 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 22:07:02,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:07:02,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:02,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-15 22:07:02,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:03,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:03,040 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 22:07:03,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:03,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:03,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:03,657 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 22:07:03,664 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 22:07:03,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:04,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:04,894 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 22:07:05,236 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:07:05,236 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 22:07:13,816 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 22:07:13,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923758712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:13,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:13,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 38 [2022-03-15 22:07:13,817 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [906317396] [2022-03-15 22:07:13,817 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:13,820 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:13,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 64 transitions. [2022-03-15 22:07:13,828 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:14,270 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 22:07:14,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:14,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:14,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2022-03-15 22:07:14,271 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 22:07:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:14,619 INFO L93 Difference]: Finished difference Result 673 states and 1632 transitions. [2022-03-15 22:07:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:07:14,619 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 22:07:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:14,621 INFO L225 Difference]: With dead ends: 673 [2022-03-15 22:07:14,621 INFO L226 Difference]: Without dead ends: 664 [2022-03-15 22:07:14,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=1426, Unknown=0, NotChecked=0, Total=1722 [2022-03-15 22:07:14,622 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 88 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 22:07:14,622 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 22:07:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-03-15 22:07:14,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 395. [2022-03-15 22:07:14,627 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 22:07:14,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 968 transitions. [2022-03-15 22:07:14,628 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 968 transitions. Word has length 28 [2022-03-15 22:07:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:14,628 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 968 transitions. [2022-03-15 22:07:14,628 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 22:07:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 968 transitions. [2022-03-15 22:07:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-15 22:07:14,628 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:14,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:14,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-15 22:07:14,843 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 22:07:14,843 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:14,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:14,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2115793823, now seen corresponding path program 47 times [2022-03-15 22:07:14,845 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:14,845 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398117334] [2022-03-15 22:07:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:14,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:15,269 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 22:07:15,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:15,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398117334] [2022-03-15 22:07:15,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398117334] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:15,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502175780] [2022-03-15 22:07:15,269 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:07:15,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:15,270 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 22:07:15,292 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 22:07:15,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-15 22:07:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-15 22:07:15,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:15,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:15,871 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 22:07:16,293 INFO L353 Elim1Store]: treesize reduction 112, result has 0.9 percent of original size [2022-03-15 22:07:16,293 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 22:07:16,301 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 22:07:16,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:17,779 INFO L353 Elim1Store]: treesize reduction 264, result has 47.7 percent of original size [2022-03-15 22:07:17,781 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 22:07:17,835 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:17,835 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 22:07:36,539 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 22:07:36,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502175780] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:36,539 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:36,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2022-03-15 22:07:36,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [984682149] [2022-03-15 22:07:36,540 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:36,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:36,557 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 72 transitions. [2022-03-15 22:07:36,558 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:37,214 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 22:07:37,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:07:37,215 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:07:37,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-03-15 22:07:37,215 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 22:07:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:37,583 INFO L93 Difference]: Finished difference Result 683 states and 1656 transitions. [2022-03-15 22:07:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-15 22:07:37,583 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 22:07:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:37,585 INFO L225 Difference]: With dead ends: 683 [2022-03-15 22:07:37,586 INFO L226 Difference]: Without dead ends: 674 [2022-03-15 22:07:37,586 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 22:07:37,586 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 22:07:37,586 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 22:07:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-03-15 22:07:37,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 400. [2022-03-15 22:07:37,591 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 22:07:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 980 transitions. [2022-03-15 22:07:37,592 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 980 transitions. Word has length 28 [2022-03-15 22:07:37,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:37,592 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 980 transitions. [2022-03-15 22:07:37,592 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 22:07:37,592 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 980 transitions. [2022-03-15 22:07:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-15 22:07:37,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:37,593 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:37,631 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 22:07:37,815 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 22:07:37,815 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:37,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1034625665, now seen corresponding path program 48 times [2022-03-15 22:07:37,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:37,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173323716] [2022-03-15 22:07:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:37,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:37,879 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 22:07:37,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:37,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173323716] [2022-03-15 22:07:37,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173323716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:37,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481744008] [2022-03-15 22:07:37,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:07:37,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:37,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:37,881 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 22:07:37,887 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 22:07:37,918 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-15 22:07:37,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:07:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-15 22:07:37,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:37,965 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 22:07:37,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:38,020 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 22:07:38,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481744008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:07:38,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:07:38,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 8 [2022-03-15 22:07:38,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155435570] [2022-03-15 22:07:38,020 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:07:38,023 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:07:38,030 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 42 transitions. [2022-03-15 22:07:38,031 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:07:38,063 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2022-03-15 22:07:38,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-15 22:07:38,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:07:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-15 22:07:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:38,064 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 22:07:38,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:07:38,144 INFO L93 Difference]: Finished difference Result 659 states and 1558 transitions. [2022-03-15 22:07:38,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-15 22:07:38,144 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 22:07:38,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:07:38,147 INFO L225 Difference]: With dead ends: 659 [2022-03-15 22:07:38,147 INFO L226 Difference]: Without dead ends: 634 [2022-03-15 22:07:38,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-03-15 22:07:38,147 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 22:07:38,147 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 22:07:38,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-03-15 22:07:38,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 486. [2022-03-15 22:07:38,153 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 22:07:38,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 1197 transitions. [2022-03-15 22:07:38,153 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 1197 transitions. Word has length 30 [2022-03-15 22:07:38,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:07:38,154 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 1197 transitions. [2022-03-15 22:07:38,154 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 22:07:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 1197 transitions. [2022-03-15 22:07:38,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:07:38,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:07:38,155 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:07:38,176 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 22:07:38,361 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 22:07:38,361 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:07:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:07:38,361 INFO L85 PathProgramCache]: Analyzing trace with hash 185436320, now seen corresponding path program 49 times [2022-03-15 22:07:38,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:07:38,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944617972] [2022-03-15 22:07:38,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:07:38,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:07:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:38,806 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 22:07:38,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:07:38,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944617972] [2022-03-15 22:07:38,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944617972] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:07:38,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26497212] [2022-03-15 22:07:38,806 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-15 22:07:38,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:07:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:07:38,808 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 22:07:38,809 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 22:07:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:07:38,842 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:07:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:07:39,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:39,988 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 22:07:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:07:40,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:07:40,727 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 22:07:40,734 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 22:07:40,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:07:43,545 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:07:43,545 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 22:07:43,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:07:43,649 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 22:08:22,110 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 22:08:22,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26497212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:22,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:22,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-03-15 22:08:22,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [704801050] [2022-03-15 22:08:22,110 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:22,114 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:22,125 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 68 transitions. [2022-03-15 22:08:22,125 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:22,587 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 22:08:22,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-15 22:08:22,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-15 22:08:22,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-03-15 22:08:22,588 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 22:08:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:23,054 INFO L93 Difference]: Finished difference Result 1635 states and 4004 transitions. [2022-03-15 22:08:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:08:23,054 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 22:08:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:23,058 INFO L225 Difference]: With dead ends: 1635 [2022-03-15 22:08:23,058 INFO L226 Difference]: Without dead ends: 1566 [2022-03-15 22:08:23,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=353, Invalid=2097, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:08:23,058 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 100 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 22:08:23,059 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 22:08:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1566 states. [2022-03-15 22:08:23,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1566 to 408. [2022-03-15 22:08:23,066 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 22:08:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1010 transitions. [2022-03-15 22:08:23,067 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1010 transitions. Word has length 32 [2022-03-15 22:08:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:23,067 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 1010 transitions. [2022-03-15 22:08:23,067 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 22:08:23,067 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1010 transitions. [2022-03-15 22:08:23,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:23,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:23,068 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:23,092 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 22:08:23,284 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 22:08:23,285 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:23,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1585636228, now seen corresponding path program 50 times [2022-03-15 22:08:23,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:23,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914258121] [2022-03-15 22:08:23,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:23,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:23,773 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 22:08:23,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:23,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914258121] [2022-03-15 22:08:23,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914258121] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:23,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615541018] [2022-03-15 22:08:23,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-15 22:08:23,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:23,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:23,775 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 22:08:23,776 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 22:08:23,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-15 22:08:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:23,809 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:08:23,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:24,870 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:24,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 90 treesize of output 178 [2022-03-15 22:08:25,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:25,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:25,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:25,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 22 [2022-03-15 22:08:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:08:25,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:08:28,378 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:08:28,379 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 22:08:28,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:28,465 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 22:08:42,761 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 22:08:42,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615541018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:08:42,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:08:42,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 48 [2022-03-15 22:08:42,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1006907772] [2022-03-15 22:08:42,762 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:08:42,765 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:08:42,773 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2022-03-15 22:08:42,773 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:08:42,953 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 22:08:42,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:08:42,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:08:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:08:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=2270, Unknown=0, NotChecked=0, Total=2652 [2022-03-15 22:08:42,954 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 22:08:43,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:08:43,475 INFO L93 Difference]: Finished difference Result 675 states and 1585 transitions. [2022-03-15 22:08:43,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-15 22:08:43,475 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 22:08:43,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:08:43,477 INFO L225 Difference]: With dead ends: 675 [2022-03-15 22:08:43,477 INFO L226 Difference]: Without dead ends: 599 [2022-03-15 22:08:43,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=431, Invalid=2431, Unknown=0, NotChecked=0, Total=2862 [2022-03-15 22:08:43,478 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, 0.4s IncrementalHoareTripleChecker+Time [2022-03-15 22:08:43,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-15 22:08:43,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-03-15 22:08:43,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 386. [2022-03-15 22:08:43,483 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 22:08:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 950 transitions. [2022-03-15 22:08:43,483 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 950 transitions. Word has length 32 [2022-03-15 22:08:43,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:08:43,483 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 950 transitions. [2022-03-15 22:08:43,484 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 22:08:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 950 transitions. [2022-03-15 22:08:43,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:08:43,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:08:43,484 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:08:43,501 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 22:08:43,691 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 22:08:43,691 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:08:43,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:08:43,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1326840904, now seen corresponding path program 51 times [2022-03-15 22:08:43,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:08:43,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906539416] [2022-03-15 22:08:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:08:43,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:08:43,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:08:44,146 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 22:08:44,146 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:08:44,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906539416] [2022-03-15 22:08:44,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906539416] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:08:44,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70028525] [2022-03-15 22:08:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-15 22:08:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:08:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:08:44,147 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 22:08:44,148 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 22:08:44,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-03-15 22:08:44,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:08:44,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:08:44,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:08:45,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:08:45,702 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 22:08:47,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:08:47,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:08:47,383 INFO L353 Elim1Store]: treesize reduction 44, result has 83.4 percent of original size [2022-03-15 22:08:47,384 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 22:08:58,142 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 22:08:58,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:09:39,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:39,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:09:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:39,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:09:39,682 INFO L353 Elim1Store]: treesize reduction 108, result has 69.4 percent of original size [2022-03-15 22:09:39,682 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 22:09:39,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:09:39,770 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 22:11:22,747 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 22:11:22,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70028525] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:11:22,747 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:11:22,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 19] total 50 [2022-03-15 22:11:22,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1442349695] [2022-03-15 22:11:22,748 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:11:22,750 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:11:22,758 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 44 transitions. [2022-03-15 22:11:22,759 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:11:23,020 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 22:11:23,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-15 22:11:23,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:11:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-15 22:11:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2323, Unknown=12, NotChecked=0, Total=2756 [2022-03-15 22:11:23,021 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 22:11:23,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:11:23,478 INFO L93 Difference]: Finished difference Result 718 states and 1745 transitions. [2022-03-15 22:11:23,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-15 22:11:23,478 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 22:11:23,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:11:23,479 INFO L225 Difference]: With dead ends: 718 [2022-03-15 22:11:23,479 INFO L226 Difference]: Without dead ends: 701 [2022-03-15 22:11:23,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=471, Invalid=2487, Unknown=12, NotChecked=0, Total=2970 [2022-03-15 22:11:23,480 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 22:11:23,480 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 22:11:23,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701 states. [2022-03-15 22:11:23,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701 to 418. [2022-03-15 22:11:23,485 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 22:11:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1024 transitions. [2022-03-15 22:11:23,486 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1024 transitions. Word has length 32 [2022-03-15 22:11:23,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:11:23,486 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1024 transitions. [2022-03-15 22:11:23,486 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 22:11:23,486 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1024 transitions. [2022-03-15 22:11:23,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:11:23,486 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:11:23,486 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:11:23,504 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 22:11:23,693 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 22:11:23,694 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:11:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:11:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 460336192, now seen corresponding path program 52 times [2022-03-15 22:11:23,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:11:23,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388513827] [2022-03-15 22:11:23,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:11:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:11:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:11:24,190 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 22:11:24,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:11:24,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388513827] [2022-03-15 22:11:24,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388513827] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:11:24,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353840018] [2022-03-15 22:11:24,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-15 22:11:24,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:24,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:11:24,195 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 22:11:24,196 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 22:11:24,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-15 22:11:24,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:11:24,228 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:11:24,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:11:25,160 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:25,161 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 22:11:26,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:26,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:26,094 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 22:11:26,101 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 22:11:26,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:11:29,213 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:11:29,214 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 22:11:29,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:29,305 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 22:11:52,004 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 22:11:52,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353840018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:11:52,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:11:52,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 47 [2022-03-15 22:11:52,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [970527165] [2022-03-15 22:11:52,005 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:11:52,008 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:11:52,017 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 52 transitions. [2022-03-15 22:11:52,017 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:11:52,178 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 22:11:52,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:11:52,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:11:52,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:11:52,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=2073, Unknown=0, NotChecked=0, Total=2450 [2022-03-15 22:11:52,179 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 22:11:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:11:52,630 INFO L93 Difference]: Finished difference Result 975 states and 2376 transitions. [2022-03-15 22:11:52,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-15 22:11:52,630 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 22:11:52,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:11:52,632 INFO L225 Difference]: With dead ends: 975 [2022-03-15 22:11:52,632 INFO L226 Difference]: Without dead ends: 947 [2022-03-15 22:11:52,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=450, Invalid=2306, Unknown=0, NotChecked=0, Total=2756 [2022-03-15 22:11:52,632 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 22:11:52,632 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 22:11:52,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-15 22:11:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 388. [2022-03-15 22:11:52,638 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 22:11:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 948 transitions. [2022-03-15 22:11:52,639 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 948 transitions. Word has length 32 [2022-03-15 22:11:52,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:11:52,639 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 948 transitions. [2022-03-15 22:11:52,639 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 22:11:52,639 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 948 transitions. [2022-03-15 22:11:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:11:52,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:11:52,640 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:11:52,657 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 22:11:52,855 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 22:11:52,855 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:11:52,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:11:52,856 INFO L85 PathProgramCache]: Analyzing trace with hash -860490096, now seen corresponding path program 53 times [2022-03-15 22:11:52,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:11:52,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393048239] [2022-03-15 22:11:52,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:11:52,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:11:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:11:53,336 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 22:11:53,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:11:53,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393048239] [2022-03-15 22:11:53,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393048239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:11:53,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96508013] [2022-03-15 22:11:53,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-15 22:11:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:11:53,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:11:53,338 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 22:11:53,338 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 22:11:53,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-15 22:11:53,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:11:53,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-15 22:11:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:11:54,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:54,305 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 22:11:55,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:55,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:11:55,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:11:55,223 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 22:11:55,231 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 22:11:55,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:11:57,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:11:57,589 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 22:11:58,200 INFO L353 Elim1Store]: treesize reduction 400, result has 46.6 percent of original size [2022-03-15 22:11:58,200 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 22:12:29,093 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 22:12:29,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96508013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-15 22:12:29,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-15 22:12:29,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 46 [2022-03-15 22:12:29,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1825430762] [2022-03-15 22:12:29,093 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2022-03-15 22:12:29,096 INFO L249 McrAutomatonBuilder]: Started intersection. [2022-03-15 22:12:29,106 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 60 transitions. [2022-03-15 22:12:29,106 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2022-03-15 22:12:29,461 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 22:12:29,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-15 22:12:29,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-15 22:12:29,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-15 22:12:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1989, Unknown=0, NotChecked=0, Total=2352 [2022-03-15 22:12:29,462 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 22:12:29,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-15 22:12:29,835 INFO L93 Difference]: Finished difference Result 916 states and 2239 transitions. [2022-03-15 22:12:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-15 22:12:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-03-15 22:12:29,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-15 22:12:29,837 INFO L225 Difference]: With dead ends: 916 [2022-03-15 22:12:29,837 INFO L226 Difference]: Without dead ends: 893 [2022-03-15 22:12:29,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=399, Invalid=2151, Unknown=0, NotChecked=0, Total=2550 [2022-03-15 22:12:29,838 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 22:12:29,838 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 22:12:29,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-15 22:12:29,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 376. [2022-03-15 22:12:29,843 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 22:12:29,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 920 transitions. [2022-03-15 22:12:29,844 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 920 transitions. Word has length 32 [2022-03-15 22:12:29,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-15 22:12:29,844 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 920 transitions. [2022-03-15 22:12:29,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-15 22:12:29,844 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 920 transitions. [2022-03-15 22:12:29,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-15 22:12:29,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-15 22:12:29,845 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-15 22:12:29,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-15 22:12:30,055 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 22:12:30,055 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-15 22:12:30,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-15 22:12:30,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1135766752, now seen corresponding path program 54 times [2022-03-15 22:12:30,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-15 22:12:30,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426933439] [2022-03-15 22:12:30,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-15 22:12:30,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-15 22:12:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-15 22:12:30,559 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-15 22:12:30,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-15 22:12:30,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426933439] [2022-03-15 22:12:30,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426933439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-15 22:12:30,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783006016] [2022-03-15 22:12:30,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-15 22:12:30,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-15 22:12:30,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-15 22:12:30,560 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 22:12:30,561 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 22:12:30,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-15 22:12:30,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-15 22:12:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 70 conjunts are in the unsatisfiable core [2022-03-15 22:12:30,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-15 22:12:32,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:32,319 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 22:12:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-15 22:12:43,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:12:43,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:12:43,560 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 22:12:47,954 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 22:12:47,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-15 22:13:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-15 22:13:22,926 INFO L353 Elim1Store]: treesize reduction 264, result has 56.1 percent of original size [2022-03-15 22:13:22,927 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 22:13:23,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-15 22:13:23,056 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 Received shutdown request... [2022-03-15 22:14:32,923 WARN L244 SmtUtils]: Removed 2 from assertion stack [2022-03-15 22:14:32,926 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-15 22:14:32,931 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-15 22:14:32,942 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 22:14:32,972 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 22:14:33,126 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 22:14:33,127 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 5 for 4ms.. [2022-03-15 22:14:33,128 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-15 22:14:33,128 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-15 22:14:33,130 INFO L732 BasicCegarLoop]: Path program histogram: [54, 1, 1] [2022-03-15 22:14:33,131 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-15 22:14:33,131 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-15 22:14:33,133 INFO L202 PluginConnector]: Adding new model inc-subseq-array.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.03 10:14:33 BasicIcfg [2022-03-15 22:14:33,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-15 22:14:33,133 INFO L158 Benchmark]: Toolchain (without parser) took 801245.37ms. Allocated memory was 194.0MB in the beginning and 426.8MB in the end (delta: 232.8MB). Free memory was 158.4MB in the beginning and 132.9MB in the end (delta: 25.4MB). Peak memory consumption was 270.4MB. Max. memory is 8.0GB. [2022-03-15 22:14:33,133 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 194.0MB. Free memory is still 159.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-15 22:14:33,133 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.26ms. Allocated memory is still 194.0MB. Free memory was 158.4MB in the beginning and 156.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:14:33,133 INFO L158 Benchmark]: Boogie Preprocessor took 12.49ms. Allocated memory is still 194.0MB. Free memory was 156.8MB in the beginning and 155.8MB in the end (delta: 992.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-15 22:14:33,133 INFO L158 Benchmark]: RCFGBuilder took 213.20ms. Allocated memory is still 194.0MB. Free memory was 155.8MB in the beginning and 146.3MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-15 22:14:33,133 INFO L158 Benchmark]: TraceAbstraction took 800995.34ms. Allocated memory was 194.0MB in the beginning and 426.8MB in the end (delta: 232.8MB). Free memory was 145.9MB in the beginning and 132.9MB in the end (delta: 13.0MB). Peak memory consumption was 258.8MB. Max. memory is 8.0GB. [2022-03-15 22:14:33,134 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 194.0MB. Free memory is still 159.6MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.26ms. Allocated memory is still 194.0MB. Free memory was 158.4MB in the beginning and 156.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.49ms. Allocated memory is still 194.0MB. Free memory was 156.8MB in the beginning and 155.8MB in the end (delta: 992.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 213.20ms. Allocated memory is still 194.0MB. Free memory was 155.8MB in the beginning and 146.3MB in the end (delta: 9.5MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 800995.34ms. Allocated memory was 194.0MB in the beginning and 426.8MB in the end (delta: 232.8MB). Free memory was 145.9MB in the beginning and 132.9MB in the end (delta: 13.0MB). Peak memory consumption was 258.8MB. 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 5 for 4ms.. - 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 5 for 4ms.. - 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 5 for 4ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 800.9s, OverallIterations: 56, TraceHistogramMax: 6, PathProgramHistogramMax: 54, EmptinessCheckTime: 0.0s, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.6s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3366 SdHoareTripleChecker+Valid, 9.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3366 mSDsluCounter, 49 SdHoareTripleChecker+Invalid, 7.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5789 mSDsCounter, 1228 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18546 IncrementalHoareTripleChecker+Invalid, 19774 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1228 mSolverCounterUnsat, 1 mSDtfsCounter, 18546 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3652 GetRequests, 1901 SyntacticMatches, 94 SemanticMatches, 1657 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 19352 ImplicationChecksByTransitivity, 125.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=486occurred in iteration=50, InterpolantAutomatonStates: 772, 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, 55 MinimizatonAttempts, 10806 StatesRemovedByMinimization, 55 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 640.4s InterpolantComputationTime, 2548 NumberOfCodeBlocks, 2548 NumberOfCodeBlocksAsserted, 232 NumberOfCheckSat, 3634 ConstructedInterpolants, 1050 QuantifiedInterpolants, 104922 SizeOfPredicates, 891 NumberOfNonLiveVariables, 5402 ConjunctsInSsa, 2297 ConjunctsInUnsatCore, 158 InterpolantComputations, 4 PerfectInterpolantSequences, 726/5602 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